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问题 选择题

某次知识竞赛中，有一道题是“假如你是英国人，要想当选为首相必须具备哪些条件？”正确的选择应为  ①成为某一政党领袖   ②领导的政党在议会选举中要成为第一大党

③必须通过国王的任命

A．①不正确，②③正确

B．①②正确，③不正确

C．①正确，②③不正确

D．①②③均正确

答案

答案：D

题目分析：在现在的英国政体之下，要当选为英国的首相，必须领导一个政党，并且参加议会选举，在议会中成为第一大党，获胜后成为首相，但是在形式上要接受国王的任命。因此①②③均正确，故选D。

点评：此题世纪上考查的是英国的君主立宪制。英国在1689年通过《权利法案》确立君主立宪制，后来国王退出内阁成为统而不治的国家元首。在君主立宪制下，代议制是其基础，首相领导一个政党，由议会产生，对议会负责，议会掌握国家主权，关系到宣战与媾和等重要的事项均有议会决定。国王统而不治，但是对外代表国家。与此相关的知识点如美国、法国等国的政体也需要掌握。

问答题

请编写一个函数，用来删除字符串中的所有空格。
例如：输入asd af aa z67，则输出为asdafaz67。
注意：部分源程序给出如下。
请勿改动主函数main和其他函数中的任何内容，仅在函数fun的花括号中填入所编写的若干语句。
试题程序：
#include＜stdio.h＞
#include＜ctype.h＞
#include＜conio.h＞ int fun(char*str)

main()

char str[81]；
int n；
clrscr()；
printf("Input a string：")；
gets(str)；
puts(str)；
fun(str)；
printf("*** Str： %s\n"，str)；
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单项选择题

A scorching sun, an endless sea of sand and a waterless, forbiddingly lonely land—that is the image most people have of deserts. But how true is this picture Deserts are drylands where rainfall is low. This is not to say rain never falls in deserts: it may fall once or twice a year in a fierce torrent that fades almost as soon as it has begun, or which evaporates in the hot air long before it has got anywhere near the earth. It may fall in a sudden sweeping flood that carries everything in its path. Rains may only come once in five or six years or not fall for a decade or more. The Mojave desert in the United States remained dry for twenty-five years.
Without water no living thing can survive, and one feature of the true desert landscape is the absence of vegetation. With little rain and hardly any vegetation the land suffers under the sun. There are virtually no clouds or trees to protect the earth’s surface and it can be burning hot. Under the sun, soils break up and crack. Wind and torrential rain sweep away and erode the surface further. Eight million square kilometers of the world’s land surface is desert. Throughout history deserts have been expanding and retreating again. Cave paintings show that parts of the Sahara Desert were green and fertile about 10,000 years ago, and even animals like elephants and giraffes roamed the land. Fossil and dunes found in fertile and damp parts of the world show that these areas were once deserts. But now the creation of new desert areas is happening on a colossal scale. Twenty million square kilometers, an area twice the size of Canada, is at a high to very high risk of becoming desert. With a further 1.25 million square kilometers under moderate risk, an area covering 30% of the earth’s land surface is desert, becoming desert, or in danger of becoming desert. The rate of growth of deserts is alarming. The world’s drylands which are under threat include some of the most important stock-rearing and wheat-growing areas and are the homes of 600--700 million people. These regions are becoming deserts at the rate of more than 58, 000 square kilometers a year or 44 hectares a minute. In North Africa at least 100,000 hectares of cropland am lost each year. At this rate there is a high risk that we will be confined to living on only 50% of this planet’s land surface within one more century unless we am able to do something about it.

What does the passage tell us about rainfall in the desert

A. It never rains.
B. It rains so little that nothing can live.
C. It rains unexpectedly.
D. It rains very infrequently.
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