编码阻遏蛋白或调节蛋白()
A.CAP结合位点
B.调节基因
C.启动基因
D.操纵基因
E.结构基因
参考答案:B
焦炭塔给水冷焦时,水给不进去或进量很少的原因是什么?
The girl made a light of her disappointment at being too sick to go to the dance.
A.made light of
B.made no light
C.made interest
D.made a little