【名词&注释】
胡萝卜(carrot)、生态环境(ecological environment)、普洱茶(puer tea)、日照时间(sunshine time)、次生韧皮部(secondary phloem)
[单选题]绿地对城市生态环境的作用，下列叙述正确的是
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
查看答案&解析
举一反三：
[单选题]38
A. when
B. before
C. unless
D. until
[单选题]The play next month aims mainly to reflect the local culture．
A. producedB．beingproduced
B. tobeproducedD．havingbeenproduced
[单选题]普洱茶是常绿乔木，为茶的变种。( )
A. 正确
B. 错误
[单选题]A small plane crashed into a hillside five miles east of the city, _____ all four people on board.
A. killed
B. killing
C. kills
D. to kill
[单选题]What is one of the problems that David is facing now?
A. He is too young to get a credit card.
B. He has no time to learn driving.
C. He has very little spare time.
D. He will soon lose his job.
[单选题]What does the phrase “clam up” in Paragraph 2 probably mean?
A. become excited B． show respect
B. 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(secondary phloem)。( )
A. 正确
B. 错误
[单选题]__ unemployment and crime are high, it can be assumed that the latter is due to the former.
A. Before
B. Where
C. Unless
D. Until
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