翻译.

1.A famous pianist is going to perform tonight.

2. One should always perform t.hat one promises.

3. The doctor performed the operation with success.

4.The company has been performing poorly over the past year.

启动子是指（）

A.DNA分子中能转录的序列

B.与RNA聚合酶结合的DNA序列

C.与阻遏蛋白结合的DNA序列

D.有转录终止信号的序列

E.与顺式作用元件结合的序列