We’d better _____ some sports because sports can give us a perfect build and protect us from getting illness easily.

A．take up

B．make up

C．pick up

D．build up

下列肝血管瘤的声像图特征中，正确的是（）。

A.大血管瘤以高回声型多见

B.小血管瘤以低回声型多见

C.可表现为混合回声影

D.多数血管瘤结节内可见丰富的血流信号

E.边界多不清晰