题型:判断题 Please _________ the TV. I want to watch football match on TV. [ ]A. turn on B. turn off C. open D. close 查看答案
题型:判断题 下列关于阻遏物的叙述哪项正确?()A.阻遏物与操纵基因结合阻碍转录B.阻遏物与结构基因结合阻碍转录C.阻遏物与调节基因结合阻碍转录D.阻遏物与RNA聚合酶结合阻碍转录E.阻遏物阻碍RNA聚合酶与启动部位结合 查看答案