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问题 选择题

温室效应会导致全球气候变暖，其主要原因是

A．CO2增多使太阳辐射到地球表面的能量增多

B．植物的光合作用吸收了CO2

C．CO2能放出能量，使地球变暖

D．CO2、CH4等温室气体会吸收地球表面发出的长波辐射，减少地球的热量散失

答案

答案：D

考查化学与生活、环境保护等。D正确，其余是错误的，答案选D。

阅读理解

阅读并填空。

      I'm Amy. Today is Monday. I have Chinese, English, math and music. I like Mondays because English is

my favourite subject. Tomorrow is Tuesday. I have computer and art. I can play computer games.

1. What day is it today?  It's ____________. 

2. What does Amy have on Mondays? She has ____________, ____________, math and ____________.

3. What day is it tomorrow?  It's ____________.

4. Amy has ____________ and ____________ on Tuesdays.
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单项选择题

牵引式铲运机的经济运距一般为( )m。

A．100
B．200
C．300
D．500
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