ρ因子的功能是（）
A.在启动区域结合阻遏物
B.增加RNA合成速率
C.释放结合在启动子上的RNA聚合酶
D.参加转录的终止过程
参考答案：D
The old lady who caught a bad cold complained that the doctor was ______ too much for the treatment given to her．
A．paying
B．offering
C．spending
D．charging
下列哪组单词划线部分读音相同
A．jacket, name
B．fine, quilt
C．pen, he
D．OK, go
