6. American English has many dialects, _________ the Midwestern, southern, African American and Spanish dialects.

A especial　 B special　　　 C specially　　 D especially

5. The film ________ a novel ___________ by Robert James Waller called Bridges of Madison County.

A is based on; written　　　　 B base on; writing

C base on; written　　　　　　 D is based on; writing

4. India has ____ of fluent English speakers because Britain ruled India from 1765to 1947.

A the large number　　 B large number　 C a large number　　 D a great deal

3. ________ no use talking to him.

A.What　 B. That　 C. This　 D.It

2. I can ________ remember that there was a time when a deep blue sky, the song of the birds, moonlight and flowers could never have kept me spellbound.

A. well　 B. very　 C. much　 D.too

1. Or are you afraid that your friend would laugh at you, or would not understand what you are ________?

A. looking through　 B. looking at　 C. going on D. going through

11. 在一个底面半径为3，高为4的圆锥内有一半径为2的球，求球上的点与底面的距离的最大值．

10. 在一个母线与轴线夹角为45°角的圆锥面S内有两个半径分别为1和3的内切球，这两个球的球心间的距离．

9．两个半径都是2的球，它们的球心相距6，平面α与它们都相切，求切点间的距离．

8．某球的体积与其表面积在数值上是一样的，有一点P与球心的距离为5，过P作球的切线，则所有切点组成的图形是___________，其周长为____________．