搜题请搜索小程序“爱下问搜题”
问题
单项选择题
与辅阻遏物结合后才与操纵基因结合的成分是
A.辅阻遏蛋白
B.操纵基因
C.CAP
D.阻遏蛋白
答案
参考答案:
A
选择题
— Haven't seen Lucy recently, what's happened?
一 Oh, it's more than two months _____ she worked here.
A. which
B. that
C. before
D. since
查看答案
单项选择题
防冲效验指标复检,掘进工作面钻屑检测不得少于()个钻孔。
A.1
B.2
C.3
D.4
查看答案