在适宜条件下,核酸分子两条链通过杂交作用可自行形成双螺旋,取决于()
A.DNA的Tm值
B.序列的重复程度
C.核酸链的长短
D.碱基序列的互补
E.以上都不是
参考答案:D
He was taken away by the police. He _________ a very serious crime.
A.must be committed
B.was being committed
C.must commit
D.must have committed
我国最重要的社会监督为()
A、劳动行政部门监督
B、相关行政部门监督
C、工会监督
D、群众监督