在齿轮的画法中，齿顶圆用（）表示。A、粗实线 B、细实线 C、点划线 D、虚线

你知道下面的文字在描述哪个人物吗？请把A~E的编号填写在括号内。

小题1:He developed the BASIC language for the first microcomputer and improved the software to make it easier for people to use computers.

小题2:During his lifetime, he had over 1000 inventions, most of which changed the world.

小题3:He is a great thinker. Many Chinese people are still influenced by his thoughts today.

小题4: He was a doctor. In 1938 he came to China from Canada to help the Chinese and died the next year after he operated on a Chinese wounded soldier.

小题5:He is one of the Chinese famous persons. He is the first astronaut who flew into space in China. We are proud of him!

Mr Frank asked me a question________I could go with him to________he called the Treasure House

the next week. [      ]

A. that; which  

B. whether; that

C. whether; what  

D. that; where

男性18岁患者，左上臂近端疼痛、肿胀1月，就诊拍X线片显示：左肱骨上段膨胀性囊状透亮区，边界清，内有骨性间隔将囊腔分成蜂窝状。最可能的诊断是（）

A.骨囊肿

B.骨纤维异样增殖症

C.动脉瘤样骨囊肿

D.内生性软骨瘤

E.骨肉瘤

无水奶油是由牛奶中分离出来的油脂产品。