Investigations agreed that passengers on the airliner ___________________ (在撞击的一瞬间就一定死亡了).
查看答案
假如有一份血清制品要求除去其中可能存在的细菌,但加热温度不能超过40℃.可采用的方法是
A. 巴氏消毒法
B. 紫外线照射
C. 微波照射
D. 滤过法
E. 都不能用
You should ___________________ (诉诸法律) when facing such a difficult problem.
22()
A. in addition
B. in addition to
C. in add
D. in add to
29()
A. employers
B. employees
C. government
D. others