下列哪一项因素不可灭活HIV()
A.超低温冷冻
B.100℃、30分钟
C.0.5%次氯酸钠、30分钟
D.0.5%H2O2、20分钟
E.70%乙醇、25分钟
参考答案:A
___________________, but he still couldn’t understand what I meant.
A. Having been told many times
B.Having told many times
C. He had been told many times.
D.Although he had been told many times.
在肌节中,I带由()肌丝组成,H带由()肌丝组成。