正确答案: C

指南针在明清时期经由海路传入阿拉伯

题目：中国古代生产和科技在不断进步中，中外交流十分繁荣。下列说法中错误的是

解析：C

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举一反三的答案和解析：

[单选题]—why, Jack, you look so tired!---Well, I _____the house and I must finish the work tomorrow.

have been painting

[单选题]配子体进一步退化是被子植物的一个进化特征。( )

正确

[单选题]---Hi, Tom. Any idea where Jane is?---Shein the classroom. I saw her there just now.

must be

[多选题]第二节(共5小题；每小题2分，共10分)根据短文内容，从短文后的七个选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Some people don't like Muzak.

The music gives them extra energy.

Music is playing in the background.

Factory workers produce 13 percent more.

解析：C,B,F,D,A

[单选题]罂粟的( )含吗啡、可卡因等30多种生物碱。

未成熟果实

[单选题]What would be the best ritle for this text?

Effects of Television on Children