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问题 单项选择题

（2009）城市中杂乱的垃圾堆、乱摆的货摊、五颜六色的广告和招贴是一种（）。

A.灯光污染

B.视觉污染

C.不可见光污染

D.电磁波辐射污染

答案

参考答案：B

解析：视觉污染是一种特殊形式的光污染，是指城市中杂乱的视觉环境，如杂乱的垃圾堆物、乱摆的货摊、五颜六色的广告和招贴等。

完形填空

Trees are useful to man in three very important ways. The first important way is that they provide man with food，wood and other products. Trees provide man and animals with food to live on the earth. It’s not easy for man to live on the earth without trees.

The second important way is that trees give us shade. On a hot summer day，people are eager to（急于）have a rest under the shade of a tree after they have walked a long way. You can imagine how important the shade of a tree is to man and animals.

The third important way is that trees help to prevent droughts and floods. However，in many parts of the world，man has not realized the third important way. He has cut trees down in large numbers. In the end he finds that he has lost the best friends he once had.

小题1:Is it easy for man to live on the earth without trees?

                                                        

小题2:What is the first important way that trees bring us?

                                                        

小题3:Where are people eager to rest after they have walked a long way?

                                                        

小题4:In the end he finds he has lost the best friends he once had. What does ‘the best friends” here mean?

                                                         

小题5:What should we do in order to protect trees?

                                                          
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单项选择题

施工升降机使用得正常与否，决定于司机的高度（）和熟练的操作技术。

A.事业心

B.上进心

C.责任心

D.进取心
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