9.一Is there any possible way to help them get rid of such a bad habit?
一To tell the truth, it’s very hard.But we on this problem.
A.worked B.had worked C.are working D.had been working
8.Not until quite recently that language is closely related to culture.
A.he realized B.did he realize C.had he realized D.he did realize
7.When it air pollution, Beijing faces the three “C”s,cars,coal and construction,which lead to Beijing's thick air pollution.
A.refers to B.comes to C.happens to D.speaks to
6.Many of friends British people make at school remain friends for life, so it is true that schooldays are “the best of life”.
A.the;不填 B.the; the C.不填; the D.不填;不填
5. stomach A. chain B. chemistry C. search D. bench
第二节 单项选择(共15小题;每小题1分,满分15分)
4. pillow A. allow B. shower C. own D. drown
3. answer A. plan B. sandwich C. branch D. rapid
2. exist A. exact B. except C. excellent D. explode
第一节:单词辨音(共5小题;每小题1分,满分5分)
从A、B、C、D四个选项中,找出其划线部分与所给单词的划线部分读音相同的选项。
1. cushion A. club B. drug C. future D. push
45.(8分)下图是利用基因工程技术生产人胰岛素的操作过程示意图,请据图回答:
(1)过程②必需的酶是______________酶,过程③必需的酶是___________________酶。
(2)若A中共有a个碱基对,其中鸟嘌呤有b个,则③④⑤过程连续进行4次,至少需要提供胸腺嘧啶_______________个。
(3)为使过程⑧更易进行,可用_____________(药剂)处理D。
(4)能否利用人的皮肤细胞来完成①过程?______,为什么? _____________________________________________________。
(5)图中的B起到__________________作用,它应该符合的条件为________________________
___________________________________。
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