可使阻遏蛋白变构并促进其与操纵基因结合的是()
A.辅阻遏蛋白
B.TFⅡB
C.CAP
D.乳糖
E.抑制基因
参考答案:A
I started into the darkness and wonderful if he was as_____my presence as I was of his.
A.aware of
B.aware that
C.quite aware
D.very aware
设n维向量α=(a,0,…,0,a)T,a<0;E为n阶单位矩阵,矩阵
其中A的逆矩阵为B,则a=______.