问题 选择题

石漠化景观是喀斯特环境恶化最直接的标志。下面是贵州清镇王家寨小流域石漠化图。读图,回答下列问题。

小题1:关于地表坡度对石漠化影响的叙述,正确的是

A.地形坡度15°以下地区无石漠化景观

B.地形坡度20°以上地区只存在轻度石漠化景观

C.地形坡度越大,极强度石漠化景观分布概率越高

D.潜在石漠化景观在地形坡度35°以上地区的分布概率高小题2:最为严重的石漠化景观出现在山地的南坡,这是因为

A.南坡地形坡度大

B.南坡是迎风坡和向阳坡

C.南坡降水少

D.南坡植被覆盖率低

答案

小题1:D

小题2:B

题目分析:

小题1:读图1可以看出,地形坡度10°-15°之间地区有极强度石漠化景观,故答案A错误,地形坡度20°-25°之间地区除了存在轻度石漠化景观外还存在极强度石漠化景观,故答案B错误,极强度石漠化景观主要存在于坡度10°-30°之间的地区,并不是地形坡度越大, 极强度石漠化景观分布概率越高,故答案C错误,潜在石漠化景观在地形坡度35°以上地区的分布概率高,故答案选D。

小题2:最为严重的石漠化景观出现在山地的南坡, 南坡是迎风坡,迎风坡由于地形抬升,易形成地形雨,降水强度大,水土流失严重,加之南坡为向阳坡,一旦发生石漠化,植被减少,阳光暴晒,蒸发旺盛,造成水分不足,植被更难恢复,所以最为严重的石漠化景观出现在山地的南坡,故答案选B,答案C错误。

单项选择题

Generally speaking, a British is widely regarded as a quiet, shy and conservative person who is (1) only among those with whom he is acquainted. When a stranger is at present, he often seems nervous, even (2) . You have to take a commuter train any morning or evening to (3) the truth of this.

Serious-looking businessmen and women sit reading their newspapers or dozing in a corner; hardly anybody talks, since to do so would be considered quite (4) .

(5) , there is an unwritten but clearly understood code of behavior which, once broken, makes the offender immediately the object of (6) .

It has been known as a fact that a British has a (7) for the discussion of their weather and that, if given a chance, he will talk about it (8) .

Some people argue that it is because the British weather seldom (9) forecast and hence becomes a source of interest and (10) to everyone.

This may be so. (11) a British cannot have much (12) in the weathermen, who, after promising fine, sunny weather for the following day, are often proved wrong (13) a cloud over the Atlantic brings rainy weather to all districts! The man in the street seems to be as accurate — or as inaccurate — as the weathermen in his (14) .

Foreigners may be surprised at the number of references (15) weather that the British (16) to each other in the course of a single day. Very often conversational greetings are (17) by comments on the weather. “Nice day, isn’t it” “Beautiful!” may well be heard instead of “Good morning, how are you” Although the foreigner may consider this exaggerated and comic, it is (18) .pointing out that it could be used to his advantage. If he wants to start a conversation with a British but is at a loss to know (19) to begin, he could do well to mention the state of the weather. It is a safe subject which will (20) an answer from even the most reserved of the British.

4()

A.impolite

B.defensive

C.deliberate

D.offensive

判断题