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问题 选择题

南方酸雨多的主要原因是（   ）

A．主要消费的能源是石油造成

B．有色冶金业发达

C．酸性红壤广布

D．环境自净能力最差

答案

答案：B

本题考查酸雨的形成。我国南方酸雨多的主要原因是有色冶金业发达，排放大量的酸性气体，南方地区降水较多，所以酸雨较严重。所以本题选择B选项。

填空题

根据短文内容及所给首字母提示写出所缺单词, 并将完整单词填在下面对应题号后的横线上。

     Hello. I'm Tom. I'm a middle school student. It's nice to meet you here. First, let me tell you

s  1   about my family. There are f  2    people in my family. They are my mother, my father,

my sister, my brother and me. My father is a worker. My mother is an English teacher. My sister

is eighteen and my brother is sixteen. I'm fourteen. We three go to the s  3    school. We all

enjoy w  4   football games. My h  5   is at West Street. There is a big tree and some small

trees around my house. The big one is a pear tree and the small ones are apple t  6  , but there

a  7   any pears or apples on them now. H  8   is a photo of my house. In the photo, you can

s  9   three cats in my house. They are all black and white. We l  10 them very much.

1.            2.            3.            4.             5.        

6.            7.            8.            9.            10.        

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解答题

分析下列实验装置，回答有关问题：

（1）甲、乙两组实验探究的问题是______其中甲组起______作用．

（2）丙装置若用来验证呼吸作用释放二氧化碳，应选用______ （选填“黑色”或“透明”）塑料袋，目的是避免绿色植物进行______作用对实验结果的干扰．

（3）丙装置若用来研究蒸腾作用，需要对该装置进行改进，办法是______．在适宜条件下，该实验的结果是______．
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