谁派遣郑和下西洋[ ] A．明太祖 B．建文帝 C．明成祖 D．明英宗

同义句转换。

1. People tell me how I can get to the station.

People tell me how ______ ______ ______ the station.

2. Mike didn't see anybody enter the building before ten.

Nobody ______ ______ ______ ______ the building before ten.

3. The bench was so long that all of us were able to sit on it.

The bench was long enough ______ ______ ______ ______ ______.

4. I think that it is important to master a foreign language.

I think ______ ______ ______ ______ a foreign language.

5. Mary spent three thousand yuan on the color TV set.

The color TV set ______ ______ three thousand yuan.

6. Of all the songs, this is the most popular.

This song is more popular ______ ______ ______ ______.

7. Mother didn't do the work for her little son, but taught him how to do it.

Instead of ______ ______ ______ ______ ______ ______ ______, she taught him how to do it.

8. I don't know either Russian or French.

I know ______ ______ ______ ______.

9. If you take a bus, you will get there in about two hours.

______ ______ ______ about two hours ______ ______ ______.

10. I'd rather watch TV at home than go to the cinema.

I prefer ______ ______ at home ______ ______ ______ the cinema.

一Is this your English book?

一Oh ,yes ．____ ．[ ]

A. Good          

B. Thank you    

C. Sorry          

D. OK

除去FeCl₂溶液中的少量FeCl_3、CuCl₂杂质，可加人的试剂为

A．碘化钾固体

B．氯水

C．铁粉

D．铜粉

口腔健康教育的方法不包括

A．个别交谈

B．进行口腔疾病的干预措施

C．组织社区活动

D．讨论会

E．借助大众传媒宣传

浮游生物与池塘水色及肥度的关系如何？