一般情况下,冲筋抹完后,待冲筋有强度时再装挡刮平。( )
参考答案:错
---Don't make any noise in the library.
---_______.
A .OK, I will B. Yes, I do C .Sorry, I won't
原核生物中真正催化复制新链延长的酶是()
A.DNA聚合酶Ⅲ
B.DNA聚合酶Ⅰ
C.DNA聚合酶Ⅱ
D.引物酶