哪项不是败血症与脓血症共有的特点 A．寒战，高热 B．白细胞计数增加 C．发病急 D

Realizing that everything she said had no effect on her son, __________.

A．her son’s teacher was asked to help solve the problem.

B．it was decided that her son’s teacher should help solve the problem.

C．She had to ask her son’s teacher to help solve the problem

D．there’s nothing she can do but ask her son’s teacher to help solve the problem.

甲数比乙数少36，甲数比乙数的60%少20，求乙数？

Mancini曲线适用于（）

A.小分子抗原，长时间扩散（48h）

B.小分子抗原，短时间扩散（24h）

C.大分子抗原，长时间扩散（48h）

D.大分子抗原，短时间扩散（24h）

E.不论分子大小

什么叫定向公差？

在焊缝金属中，把能够进行自由扩散的氢称为（）。

A、残余氢

B、固熔氢

C、扩散氢