Sorry.I can't understand you.Please say

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问题选择题

Sorry. I can't understand you. Please say that _____. [ ]

A. either

B. more

C. again

D. neither

答案

答案：C

填空题

1. She____（希望）her daughter is more beautiful.

2. I____ （希望）more clever and more handsome.

3. I'm a little fat .I （希望）I were much thinner.

4. Mr. Smith was afraid of （吃）too much sugar.

5. It's time for class,____ （停止交谈）at once.

选择题

聚2—甲基—1—丙烯是生产汽油清洁剂（kerocom piba）的中间产物。下列关于聚异丁烯的说法中，错误的是

A．聚2—甲基—1—丙烯可以通过加聚反应制得

B．聚2—甲基—1—丙烯的分子式为 (C₄H₈)_n

C．聚2—甲基—1—丙烯完全燃烧生成CO₂和H₂O的物质的量相等

D．聚2—甲基—1—丙烯能使溴的四氯化碳溶液褪色