图1示意我国植被的地带性分布。读图回答1-2小题。小题1:图中_爱下问搜题

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问题选择题

图1示意我国植被的地带性分布。读图回答1-2小题。

小题1:图中②为

A．草原

B．荒漠

C．针叶林

D．针阔混交林小题2:我国东部森林植被的东西宽度在南北方向上发生变化，

其主导因素是

A．纬度

B．洋流

C．地形

D．季风

答案

小题1:A

小题2:D

小题1:A图中②位于秦岭—淮河以北的北方地区，我国北方地区植被自东向西依次为落叶阔叶林（针阔混交林）、草原、荒漠，②区介于落叶阔叶林（针阔混交林）、荒漠两类植被之间，对应植被应为草原，故答案选A。

本题考查差异性——从沿海到内陆的地域分异规律，具体考查中国植被东西向地带性分布，主要考查考生读图能力、调动和运用知识分析问题的能力。

小题2:读图可以看出我国东部森林植被的东西宽度越往北越窄，主要原因是越往北夏季风向西影响范围越小，降水减少，影响的区域范围变小造成的，所以影响我国东部森林植被东西宽度在南北方向上发生变化的主导因素是季风，故答案选D。

本题考查影响植被分布的自然因素，主要考查考生调动和运用知识分析问题的能力。

完形填空

Which of your two hands do you use most? Very few of us can use __1__ of our hands equally well. Most of us are right-handed. Only about five people ___2___ a hundred are left-handed. New-born babies can grasp(抓住)objects with__3____ of their hands, but in about two years they usually prefer to use their ___4___ hands. Scientists don’t know why this __5___.

Monkeys are our ___6___ relatives(亲戚)in the animal world. Scientists have found that monkeys prefer to use one of their hands more than the ___7___ ---but it can be either hand. There are as many right-handed monkeys as left-handed___8___ . Next time you visit the zoo, ___9___ the monkeys carefully. You’ll see that some of most them will prefer to use their right hands when they swing(荡秋千), and others will use their left hands. But most human beings use their right hands better and this makes life ___10___ for those who prefer to use their left hands. In fact we live in a right-handed world.

( )1. A. either B. both C. two D. all

( )2. A. from B. among C. from among D. out of

( )3. A. either B. neither C. two D. all

( )4. A. two B. both C. right D. left

( )5. will happen B. happens C. take place D. will take place

( )6. A. farthest B. furthest C. best D. closest

( )7. A. other B. right C. left D. two

( )8. A. one B. ones C. monkey D. people

( )9. A. look B. see C. watch D. read

( )10.A. interesting B. comfortable C. easy D. difficult

单项选择题

下面哪种材料不是跳线环所用的材料？（）

A.金属

B.木头

C.塑料