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
查看答案
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
Joan: Would you like to go to the concert tonightLucy:（）
A. But I have to work.
B. Coffee, please.
C. Fine, and you
D. May be Joan,
E. Thanks.
F. Good luck.
G. You, too
H. Yes, here you are.
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