（）提出的“任意球的表面积都是其外切圆柱表面积的三分之二”这一重要数学观点。
A、欧几里得
B、阿基米德
C、西塞罗
D、托勒密
参考答案：B
A nuclear power station was destroyed and the natives were faced with . [ ]
A. occupation
B. radiation
C. recreation
D. discrimination
为预防新生儿窒息，应常规作会阴侧切术。
