RNA聚合酶能以两个方向同启动子结合，并启动相邻基因的转录，但是模板链的选择由另外的蛋白因子确定。 ( )
参考答案：错
They didn't know _____ their holiday. [ ]
A. how they can spend
B. how could they spend
C. how to spend
D. how they spend
下列药物没有止呕作用的是
A．半夏
B．藿香
C．佩兰
D．白豆蔻
E．竹茹
