—Jack called to say that he would not accept the job .

—I had talked him into taking it up many times .      since he still refuses .

A．I’ll come to his help

B．I can’t help it

C．I’ll talk it over with him

D．I’ll phone him up

反转录是指（）。

A．以RNA为模板合成RNA

B．以DNA为模板合成DNA

C．以DNA为模板合成RNA

D．以RNA为模板合成蛋白质

E．以RNA为模板合成DNA