急！求Canada-land of the maple tree 课文

Posted 2023-04-12

就是牛津高中英语教材模块9第一单元的Reading的课文
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Canada--land of maple tree全文

Canada is one of the world largest countries in the world, second only to Russia, and has always been famous for its fantastic natural scenery. Canada has vast areas of wilderness, from the Arctic north, where average winter temperatures are usually minus 20 degrees centigrade, to the 8,892-kilometre-long border with the USA in the south, which is said to be the longest border in the world not defended by an army or police. On the eastern and western boundaries, the country borders the two great oceans----the Atlantic and the Pacific.

Within this huge country, there are frozen wastes, vast mountain ranges, enormous open plains, countless rivers and seemingly endless forests. There are many wild animals in the forests and on the freezing, ice-covered lands in the north, and fish are abundant in the seas and rivers. For those who love outdoor activities, it is possible to hike, sail, cross-country ski or travel by snowmobile for hours----or even days----without meeting another person. Canadians, especially wildlife photographers and hunters, are quite fond of this wilderness, and you will be too!

Beautiful scenery is just one of the treasures Canada has to offer. The vast majority of Canada’s population of about 30 million people is urban. You will be thrilled by Toronto, Montreal, Vancouver and Edmonton----all known internationally for their metropolitan lifestyle, beautiful architecture and unique culture.

Toronto, the largest city in Canada, is often said to be the most multicultural city in the world. People there have ancestors from Ireland, Portugal, China, Lebanon, Italy and Vietnam, as well as from many other places. Located in the heart of Toronto is the Canadian National Tower, which is often called the CN tower for short. Rising 553 metres into the shy, it is the tallest tower in the world!

Montreal, a port in the province of Quebec, is the second largest city in Canada, and also the second largest French-speaking city in the world, Paris being the largest. Quebec, which was originally colonized by France, was lost to the British in 1763, but its population is still over 70 per cent French. Because of this, Montreal has a wonderful mix of Old World (European) and New World (North American) architecture. There are old building, churches, narrow streets and alleys, all alongside glass and steel and concrete skyscrapers reaching upwards. As a modern city, Montreal has colourful nightlife, with many restaurants and clubs, as well as cultural and street festivals to ensure that no visitor is ever bored.

Smaller in size, but equally famous, is the city of Vancouver in the province of British Columbia on the Pacific coast. Another multicultural city, it has one of the largest Chinese populations in North America. Vancouver has superb scenery, a beautiful harbor, and all the comforts of modern life and international cuisine, in addition to being close to the most wilderness and ski areas.

Edmonton, a city in British Columbia’s neighbouring province of Alberta, is home to the West Edmonton Mall. The mall is said to be the largest pedestrian mall in the world. It is like an underground city, covering an area of more than 20 football pitches. The mall consists of eight kilometers of tunnels, filled with shops, art galleries and even a water park. It attracts over 55,000 customers everyday!

Near to the Atlantic coast is Niagara Falls. It is perhaps the most widely recognized natural phenomenon in Canada. The waterfalls, the largest of which is shaped like a semicircle, are 670 metres wide, and fall 56 metres in an awesome white sheet of water. Millions of visitors from all over the world come here every year.

Canada has a very interesting history. In 1896, gold was discovered in the Klondike area north of Alaska. Historians say that approximately one million people left their homes from different areas all over North America to seek their fortunes in the ‘gold rush’. Although only a handful of people were successful, many stayed and established settlements in the area, and there are now many museums showing what life was like back then.

Finally, if you visit during the autumn, you can see Canada’s national symbol----the maple leaf! There are many maple trees in Canada and a maple leaf is featured on the Canadian flag. In autumn, maple leaves turn a beautiful red and the tree itself supplies Canada’s most famous food----maple syrup----which goes perfectly with pancakes.

With all of this attractions, you can see why, in 1996, the UN named Canada the best country in the world to live in!

拓展资料：

全文翻译

加拿大是世界上世界上最大的国家之一，仅次于俄罗斯，并以其奇妙的自然风光而闻名。加拿大有大片荒野，从北极北部，冬季平均温度通常为零下20摄氏度，到南部与美国的8,892公里长的边界，据说这是世界上最长的边界。由军队或警察辩护。在东部和西部边界，该国与两个大洋 - 大西洋和太平洋接壤。

在这个巨大的国家，有冰冻的废弃物，广阔的山脉，巨大的开阔平原，无数的河流和看似无尽的森林。森林中和北方冰冻的冰雪覆盖的土地上有许多野生动物，海洋和河流中的鱼类丰富。对于那些喜欢户外活动的人来说，可以徒步，帆船，越野滑雪或乘坐雪地摩托车旅行几个小时甚至几天----而不会遇到另一个人。加拿大人，尤其是野生动物摄影师和猎人，非常喜欢这片荒野，你也会如此！

美丽的风景只是加拿大的一大遗产。加拿大绝大多数人口约为3000万，是城市人口。多伦多，蒙特利尔，温哥华和埃德蒙顿将为您的都市生活方式，美丽的建筑和独特的文化而闻名。

多伦多是加拿大最大的城市，通常被认为是世界上最具多元文化的城市。人们有来自爱尔兰，葡萄牙，中国，黎巴嫩，意大利和越南的祖先，以及许多其他地方的祖先。加拿大国家大厦位于多伦多市中心，通常被称为CN塔。在害羞的553米处，它是世界上最高的塔！

蒙特利尔是魁北克省的一个港口，是加拿大第二大城市，也是世界上第二大法语城市，巴黎是最大的城市。最初被法国殖民的魁北克省在1763年输给了英国人，但其人口仍然超过70％的法国人。因此，蒙特利尔拥有旧世界（欧洲）和新世界（北美）建筑的完美结合。这里有古老的建筑，教堂，狭窄的街道和小巷，玻璃，钢铁和混凝土摩天大楼都向上延伸。作为一个现代化的城市，蒙特利尔拥有丰富多彩的夜生活，许多餐馆和俱乐部，以及文化和街头节日，以确保没有游客感到无聊。

规模较小，但同样着名的是位于太平洋沿岸不列颠哥伦比亚省的温哥华市。它是另一个多元文化城市，拥有北美最大的中国人口之一。温哥华拥有一流的风景，美丽的海港，现代生活和国际美食的所有舒适，此外还靠近最荒野和滑雪区。

埃德蒙顿是不列颠哥伦比亚省阿尔伯塔省的一个城市，是西埃德蒙顿购物中心的所在地。该购物中心据说是世界上最大的步行购物中心。它就像一个地下城，占地超过20个足球场。该商场由8公里长的隧道组成，里面遍布商店，艺术画廊甚至是水上乐园。它每天吸引超过55,000名顾客！

尼亚加拉大瀑布附近的大西洋沿岸。它可能是加拿大最广为人知的自然现象。瀑布最大的形状像一个半圆形，宽670米，落在56米深的白色水面上。每年都有数百万来自世界各地的游客来到这里。

加拿大有一段非常有趣的历史。 1896年，在阿拉斯加北部的克朗代克地区发现了黄金。历史学家说，大约有一百万人从北美不同地区离开家园，在“淘金热”中寻求财富。虽然只有少数人获得了成功，但许多人在该地区停留并建立了定居点，现在有许多博物馆展示了当时的生活。

最后，如果您在秋季访问，您可以看到加拿大的国家象征 - 枫叶！加拿大有许多枫树，加拿大国旗上有枫叶。在秋天，枫叶变成美丽的红色，树本身供应加拿大最着名的食物 - 枫糖浆 - 与煎饼完美搭配。

拥有所有这些景点，你可以看到为什么在1996年，联合国将加拿大称为世界上最好的国家！

参考技术A 加拿大- 加拿大枫树的土地是世界上最大的国家在世界第二，仅次于俄罗斯，一直是著名的梦幻般的自然风光。加拿大拥有丰富的荒野地区，从北部的北极，其中冬季平均气温通常在零下20摄氏度，与美国的8,892公里长的边界，在南方，据说是世界上最长的边境悍的军队或警察。在东部和西部边界，国家接壤的两个大洋----大西洋和太平洋， 在这个巨大的国家，有冷冻废物，广袤的山脉，巨大的开阔的平原上，无数的河流和看似无尽的森林。有许多野生动物在森林和冻结，冰层覆盖的土地在北方，鱼是在海洋和河流丰富。对于那些热爱户外活动的人，有可能加息，赛欧，越野滑雪，雪地摩托旅游小时----甚至几天----没有另一个人会议。加拿大人，特别是野生动物摄影师和猎人，很喜欢这旷野，你太 美丽的风景只是其中的宝藏加拿大提供。加拿大的人口约30万人，绝大多数是城市。你会高兴得不得了所有已知的国际大都市的生活方式，美丽的建筑和独特的文化。加拿大最大的城市多伦多，多伦多，蒙特利尔，温哥华和埃德蒙顿---- 就是常说是在世界上最多元文化的城市。那里的人的祖先来自爱尔兰，葡萄牙，中国，黎巴嫩，意大利和越南，以及其他许多地方。坐落在多伦多市中心的加拿大国家电视塔，通常被称为短的CN塔。成害羞的瑞星553米，它是世界上最高的高塔！ 蒙特利尔，魁北克省的一个港口，是加拿大第二大城市，也是第二大法语城市在世界上，巴黎最多的。魁北克，它最初是法国的殖民地，1763年输给了英国，但它的人口仍超过70％的法国人。正因为如此，蒙特利尔有一个美好的混合旧世界（欧洲）及新世界（北美）架构。有老建筑，教堂，狭窄的街道和小巷，沿着玻璃钢和混凝土的摩天大楼向上到达。作为一个现代化的城市，蒙特利尔拥有丰富多彩的夜生活，许多餐馆和俱乐部，以及文化和街头节日以确保从来没有访客无聊， 规模较小，但同样著名的，是温哥华市在全省英国哥伦比亚在太平洋沿岸。另外一个多元文化的城市，它在北美中国最大的人群之一。温哥华有高超的风景，一个美丽的海港，和所有现代生活和国际美食的舒适，除了接近的最荒野和滑雪区 埃德蒙顿，在不列颠哥伦比亚省的邻近省份阿尔伯塔省的一个城市，是西部老家去埃德蒙顿购物中心。该商场被说成是在世界上最大的商业步行街。它就像一个地下城，占地超过20个足球场。该商场由8 公里长的隧道，充满了商店，艺术画廊和一个水上公园。它吸引了超过55,000名客户的日常生活！ 到大西洋沿岸附近的尼亚加拉大瀑布。这也许是在加拿大最广泛认可的自然现象。瀑布，最大的，它的形状像一个半圆，宽670米，下降56米，真棒白纸水。以百万计的游客从世界各地来到这里每年加拿大有一个非常有趣的历史。在1896年，黄金被发现在克朗代克地区阿拉斯加北部。历史学家说，来自不同领域遍布北美，约百万人离开他们的家园在“淘金”寻找自己的财富。虽然只有极少数的人是成功的，许多住在该地区建立的定居点，现在有很多博物馆，展示什么样的生活，然后回来。 最后，如果你在秋季访问，你可以看到加拿大民族的象征--- -枫叶！在加拿大有许多枫树，加拿大国旗上的枫叶。在秋季，枫叶，把一个美丽的红色和树本身提供加拿大最有名的食品----枫糖浆----完美煎饼。 所有的景点，你可以看到为什么在1996年，联合国加拿大在世界上最好的国家命名住！ 参考技术B Canada is one of the world largest countries in the world, second only to Russia, and has always been famous for its fantastic natural scenery. Canada has vast areas of wilderness, from the Arctic north, where average winter temperatures are usually minus 20 degrees centigrade, to the 8,892-kilometre-long border with the USA in the south, which is said to be the longest border in the world not defended by an army or police. On the eastern and western boundaries, the country borders the two great oceans----the Atlantic and the Pacific. Within this huge country, there are frozen wastes, vast mountain ranges, enormous open plains, countless rivers and seemingly endless forests. There are many wild animals in the forests and on the freezing, ice-covered lands in the north, and fish are abundant in the seas and rivers. For those who love outdoor activities, it is possible to hike, sail, cross-country ski or travel by snowmobile for hours----or even days----without meeting another person. Ca
加拿大- 加拿大枫树的土地是世界上最大的国家在世界第二，仅次于俄罗斯，一直是著名的梦幻般的自然风光。加拿大拥有丰富的荒野地区，从北部的北极，其中冬季平均气温通常在零下20摄氏度，与美国的8,892公里长的边界，在南方，据说是世界上最长的边境悍的军队或警察。在东部和西部边界，国家接壤的两个大洋----大西洋和太平洋， 在这个巨大的国家，有冷冻废物，广袤的山脉，巨大的开阔的平原上，无数的河流和看似无尽的森林。有许多野生动物在森林和冻结，冰层覆盖的土地在北方，鱼是在海洋和河流丰富。对于那些热爱户外活动的人，有可能加息，赛欧，越野滑雪，雪地摩托旅游小时----甚至几天----没有另一个人会议。加拿大人，特别是野生动物摄影师和猎人，很喜欢这旷野，你太 美丽的风景只是其中的宝藏加拿大提供。加拿大的人口约30万人，绝大多数是城市。你会高兴得不得了所有已知的国际大都市的生活方式，美丽的建筑和独特的文化。加拿大最大的城市多伦多，多伦多，蒙特利尔，温哥华和埃德蒙顿---- 就是常说是在世界上最多元文化的城市。那里的人的祖先来自爱尔兰，葡萄牙，中国，黎巴嫩，意大利和越南，以及其他许多地方。坐落在多伦多市中心的加拿大国家电视塔，通常被称为短的CN塔。成害羞的瑞星553米，它是世界上最高的高塔！ 蒙特利尔，魁北克省的一个港口，是加拿大第二大城市，也是第二大法语城市在世界上，巴黎最多的。魁北克，它最初是法国的殖民地，1763年输给了英国，但它的人口仍超过70％的法国人。正因为如此，蒙特利尔有一个美好的混合旧世界（欧洲）及新世界（北美）架构。有老建筑，教堂，狭窄的街道和小巷，沿着玻璃钢和混凝土的摩天大楼向上到达。作为一个现代化的城市，蒙特利尔拥有丰富多彩的夜生活，许多餐馆和俱乐部，以及文化和街头节日以确保从来没有访客无聊， 规模较小，但同样著名的，是温哥华市在全省英国哥伦比亚在太平洋沿岸。另外一个多元文化的城市，它在北美中国最大的人群之一。温哥华有高超的风景，一个美丽的海港，和所有现代生活和国际美食的舒适，除了接近的最荒野和滑雪区 埃德蒙顿，在不列颠哥伦比亚省的邻近省份阿尔伯塔省的一个城市，是西部老家去埃德蒙顿购物中心。该商场被说成是在世界上最大的商业步行街。它就像一个地下城，占地超过20个足球场。该商场由8 公里长的隧道，充满了商店，艺术画廊和一个水上公园。它吸引了超过55,000名客户的日常生活！ 到大西洋沿岸附近的尼亚加拉大瀑布。这也许是在加拿大最广泛认可的自然现象。瀑布，最大的，它的形状像一个半圆，宽670米，下降56米，真棒白纸水。以百万计的游客从世界各地来到这里每年加拿大有一个非常有趣的历史。在1896年，黄金被发现在克朗代克地区阿拉斯加北部。历史学家说，来自不同领域遍布北美，约百万人离开他们的家园在“淘金”寻找自己的财富。虽然只有极少数的人是成功的，许多住在该地区建立的定居点，现在有很多博物馆，展示什么样的生活，然后回来。 最后，如果你在秋季访问，你可以看到加拿大民族的象征--- -枫叶！在加拿大有许多枫树，加拿大国旗上的枫叶。在秋季，枫叶，把一个美丽的红色和树本身提供加拿大最有名的食品----枫糖浆----完美煎饼。 所有的景点，你可以看到为什么在1996年，联合国加拿大在世界上最好的国家命名住！ 参考技术C Canada is one of the world largest countries in the world, second only to Russia, and has always been famous for its fantastic natural scenery. Canada has vast areas of wilderness, from the Arctic north, where average winter temperatures are usually minus 20 degrees centigrade, to the 8,892-kilometre-long border with the USA in the south, which is said to be the longest border in the world not defended by an army or police. On the eastern and western boundaries, the country borders the two great oceans----the Atlantic and the Pacific. Within this huge country, there are frozen wastes, vast mountain ranges, enormous open plains, countless rivers and seemingly endless forests. There are many wild animals in the forests and on the freezing, ice-covered lands in the north, and fish are abundant in the seas and rivers. For those who love outdoor activities, it is possible to hike, sail, cross-country ski or travel by snowmobile for hours----or even days----without meeting another person. Canadians, especially wildlife photographers and hunters, are quite fond of this wilderness, and you will be too! Beautiful scenery is just one of the treasures Canada has to offer. The vast majority of Canada’s population of about 30 million people is urban. You will be thrilled by Toronto, Montreal, Vancouver and Edmonton----all known internationally for their metropolitan lifestyle, beautiful architecture and unique culture. Toronto, the largest city in Canada, is often said to be the most multicultural city in the world. People there have ancestors from Ireland, Portugal, China, Lebanon, Italy and Vietnam, as well as from many other places. Located in the heart of Toronto is the Canadian National Tower, which is often called the CN tower for short. Rising 553 metres into the shy, it is the tallest tower in the world! Montreal, a port in the province of Quebec, is the second largest city in Canada, and also the second largest French-speaking city in the world, Paris being the largest. Quebec, which was originally colonized by France, was lost to the British in 1763, but its population is still over 70 per cent French. Because of this, Montreal has a wonderful mix of Old World (European) and New World (North American) architecture. There are old building, churches, narrow streets and alleys, all alongside glass and steel and concrete skyscrapers reaching upwards. As a modern city, Montreal has colourful nightlife, with many restaurants and clubs, as well as cultural and street festivals to ensure that no visitor is ever bored. Smaller in size, but equally famous, is the city of Vancouver in the province of British Columbia on the Pacific coast. Another multicultural city, it has one of the largest Chinese populations in North America. Vancouver has superb scenery, a beautiful harbor, and all the comforts of modern life and international cuisine, in addition to being close to the most wilderness and ski areas. Edmonton, a city in British Columbia’s neighbouring province of Alberta, is home to the West Edmonton Mall. The mall is said to be the largest pedestrian mall in the world. It is like an underground city, covering an area of more than 20 football pitches. The mall consists of eight

CF 1005C Summarize to the Power of Two hash/STL-map

A sequence a1,a2,…,an is called good if, for each element ai, there exists an element aj (i≠j) such that ai+aj is a power of two (that is, 2d for some non-negative integer d).

For example, the following sequences are good:

[5,3,11] (for example, for a1=5 we can choose a2=3. Note that their sum is a power of two. Similarly, such an element can be found for a2 and a3),
[1,1,1,1023],
[7,39,89,25,89],
[].
Note that, by definition, an empty sequence (with a length of 0) is good.

For example, the following sequences are not good:

[16] (for a1=16, it is impossible to find another element aj such that their sum is a power of two),
[4,16] (for a1=4, it is impossible to find another element aj such that their sum is a power of two),
[1,3,2,8,8,8] (for a3=2, it is impossible to find another element aj such that their sum is a power of two).
You are given a sequence a1,a2,…,an. What is the minimum number of elements you need to remove to make it good? You can delete an arbitrary set of elements.

Input
The first line contains the integer n (1≤n≤120000) — the length of the given sequence.

The second line contains the sequence of integers a1,a2,…,an (1≤ai≤109).

Output
Print the minimum number of elements needed to be removed from the given sequence in order to make it good. It is possible that you need to delete all n elements, make it empty, and thus get a good sequence.

Examples
Input
6
4 7 1 5 4 9
Output
1
Input
5
1 2 3 4 5
Output
2
Input
1
16
Output
1
Input
4
1 1 1 1023
Output
0
Note
In the first example, it is enough to delete one element a4=5. The remaining elements form the sequence [4,7,1,4,9], which is good.

#include<cstdio>
#include<string>
#include<cstdlib>
#include<cmath>
#include<iostream>
#include<cstring>
#include<set>
#include<queue>
#include<algorithm>
#include<vector>
#include<map>
#include<cctype>
#include<stack>
#include<sstream>
#include<list>
#include<assert.h>
#include<bitset>
#include<numeric>
#define debug() puts("++++")
#define gcd(a,b) __gcd(a,b)
#define lson l,m,rt<<1
#define rson m+1,r,rt<<1|1
#define fi first
#define se second
#define pb push_back
#define sqr(x) ((x)*(x))
#define ms(a,b) memset(a,b,sizeof(a))
#define sz size()
#define be begin()
#define pu push_up
#define pd push_down
#define cl clear()
#define lowbit(x) -x&x
#define all 1,n,1
#define rep(i,x,n) for(int i=(x); i<(n); i++)
#define in freopen("in.in","r",stdin)
#define out freopen("out.out","w",stdout)
using namespace std;
typedef long long ll;
typedef unsigned long long ULL;
typedef pair<int,int> P;
const int INF = 0x3f3f3f3f;
const ll LNF = 1e18;
const int N = 1e3 + 20;
const int maxm = 1e6 + 10;
const double PI = acos(-1.0);
const double eps = 1e-8;
const int dx[] = {-1,1,0,0,1,1,-1,-1};
const int dy[] = {0,0,1,-1,1,-1,1,-1};
int dir[4][2] = {{0,1},{0,-1},{-1,0},{1,0}};
const int mon[] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
const int monn[] = {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
int n;
int a[maxm];
map<int,int> m;
/*
*/
int main()
{
    while(cin>>n)
    {
        int f,c=0;
        m.clear();
        ms(a,0);

        rep(i,0,n)
        {
            scanf("%d",&a[i]);
            m[a[i]]++;
        }
        rep(i,0,n)
        {
            f=0;
            rep(j,0,31)
            {
                int t = 1<<j;
                int tt = t - a[i];
                if(m[tt])
                {
                    if(t - a[i] == a[i]) //找到相同的比如4 4/8 8
                    {
                        if(m[tt] > 1) //相同的不止有一个
                        {
                            f = 1;
                            break;
                        }
                    }
                    else
                    {
                        f = 1;
                        break;
                    }
                }
            }
            if(!f) c++;
        }
        cout<<c<<endl;
    }
}
/*
1 2 4 8 16 32 64
1 3 5
2 4

4 7 1 5 4 9
1 4 4 5 7 9

*/