患者，女，16岁。坐船旅途中；面色苍白，冷汗，头晕，呕吐，HR60次/分，BP90/

物业中控室面积应根据产品类型与建筑不同有所增加，但最低不低于（）

A.20㎡

B.30㎡

C.40㎡

D.50㎡

.-- His father is a professor and has been teaching in the university for more than twenty years.

-- _____.

A．So is his mother

B．So has his mother

C．So his mother does

D．So it is with his mother

回转支承装置有何作用？

关于超限与超载说法正确的是：（）

A、超限一定超载

B、超限不一定超载

C、超载一定超限

D、超载不一定超限

成人体液占体重的比例为

A．40%
B．50%
C．60%
D．70%～80%
E．90%