在复杂的国际背景下，中国企业应该尽快实现由;中国制造;到;中国

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问题单项选择题

在复杂的国际背景下，中国企业应该尽快实现由;中国制造;到;中国创造;的转变。要实现这一转变，企业应该（）①降低劳动力成本②转变经济发展方式③提高自主创新能力④促进产品结构优化升级

A.①②③

B.②③④

C.①③④

D.①②④

答案

参考答案：B

填空题

用动词的适当形式填空。

1. I'm frightened of _____ (travel) by plane.

2. What _____ (happen) to you just now?

3. Thank you for _____ (write) to me.

4. I found it easy _____ (learn) English well.

5. It _____ (take) us 3 hours _____ (finish) the work yesterday.

6. I will go to the library _____ (learn) some animals.

7. Andy is crazy about _____ (dance).

8. The following Saturday, we _____ (visit) the great museum.

9. Listen! Someone _____ (sing) Beijing Opera in the next room.

10. The baby _____ (weigh) 4 kilos when he was born.

填空题

肝脏是人体最大的腺体，它分泌的消化液是，汇集于中。该消化液通过流入小肠，有乳化的作用。