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问题 选择题

下列各组中的两物质相互反应时，若改变反应条件(温度、反应物用量比)，化学反应的本质并不改变的是 　[ ]

A．Na和O2

B．NaOH和CO2

C．Na2O2和CO2

D．木炭(C)和O2

答案

答案：C

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用所给词的适当形式填空

小题1:The garden is the best place _________(grow) flowers. Let’s ________(grow) some here.

小题2:Miss Gao is always ________(friend) to her students.

小题3:His mother asks him _________(study) hard.

小题4:This talk is about how ____________(learn) English well.

小题5: Mary lives on the        (twelve) floor.

小题6: It takes him two hours  _____  (finish)        (do) his homework.

小题7:Why don’t you _______(have) a break? You look so tired.

小题8: I would like to live in tall ________(build) because we can be close to our friends.

小题9:Your plan sounds really _______(wonder).

小题10:KFC and McDonalds are famous ________ (west) restaurants.
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A.项目建议书阶段

B.项目评估阶段

C.可行性研究阶段

D.设计任务书阶段
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