In some countries, very important to be on time. [ ]
A. it
B. it's
C. its
D. that's
答案:B
基站机房的温度要求为()。
A.C级10-20℃
B.C级15-25℃
C.C级20-30℃
D.C级10-35℃
胆汁酸合成的关键酶是()。
A.3α羟化酶
B.6α羟化酶
C.5α羟化酶
D.4α羟化酶
E.7α羟化酶