肾型鸡传染性支气管炎的病变特征为（）。 A.气管黏膜增厚、混浊，表面有结节样病灶 B

宿主龋齿非易感性表现在

A．糖的摄入量多

B．氟的摄入量多

C．口腔菌斑量多

D．牙齿窝沟点隙多

E．漱口次数少

用所给词的适当形式填空。

1. Let me ________ ( help) her with her English.

2. ________ ( take) a bus from Sixth. Avenue and go down Bridge Street.

3. The Summer Palace is a good place ________ ( have) fun in Beijing.

4.  Children often enjoy ________ ( play ) computer games.

5. I know you ________ ( arrive) next Sunday.

6. Look at the photo. The ________ ( five) man on the left is our PE teacher.

7. A good ________ (begin)makes a good ending.

8. Do you enjoy ________ ( you) in the park every week?

9. Be careful (当心) when  you ________ ( across) the street.

10. Every year many ________ ( visit) come to visit the Great Wall.

根据指导外商投资方向的有关规定，从事国家规定实行保护性开采的特种矿种勘探的项目属于国家限制类外商投资项目。( )

槟榔的功效是（）

A.驱虫消积、行气消疳

B.驱虫化瘀行气

C.驱虫消积、行气利水

D.驱虫消疳疗癣

E.驱虫消积、通便、润肺

脱蜡的目的是，降低油品的（）。

A.残炭

B.粘度

C.凝固点

D.熔点