催化真核mRNA前体转录的酶是
A.RNA聚合酶ⅠB.RNA聚合酶ⅡC.RNA聚合酶ⅢD.RNA复制酶
参考答案:B
一件上衣368元,上衣比一条裙子贵196元。买这两件共需要多少钱?
The students made heated discussions ______ the education system.
A.as to
B.due to
C.owing to
D.with regard