正确答案: A

调节城市大气碳氧平衡 有明显的增温降湿效应 减少城市地区日照时间 消除城市大气酸雨污染

题目：绿地对城市生态环境的作用，下列叙述正确的是

解析：A

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举一反三的答案和解析：

[单选题]38

when

[单选题]The play next month aims mainly to reflect the local culture．

tobeproducedD．havingbeenproduced

[单选题]普洱茶是常绿乔木，为茶的变种。( )

正确

[单选题]A small plane crashed into a hillside five miles east of the city, _____ all four people on board.

killing

[单选题]What is one of the problems that David is facing now?

He is too young to get a credit card.

[单选题]What does the phrase “clam up” in Paragraph 2 probably mean?

refuse to talkD． seek help

[单选题]胡萝卜是变态根，主要食用其次生韧皮部。( )

正确

[单选题]__ unemployment and crime are high, it can be assumed that the latter is due to the former.

Where