—John Adams didn’t play the lead role very well, right?

—Well, ________. I think he is a very good actor.

A．I don’t like it

B．I don’t think so

C．that’s true

D．I agree

上消化道大出血的临床表现中，呕血还是便血主要取决于（）

A.出血部位的高低

B.血液在胃肠内的停滞时间

C.肠蠕动的快慢

D.出血速度和量

E.凝血功能情况