与成年人比较，小儿生理和解剖有其特点。

关于小儿循环系统，叙述正确的有（）。

A.心脏对后负荷增加耐受性好

B.心排血量依赖心率变化

C.心肌收缩性差

D.心室顺应性高

E.心室顺应性低

F.心每搏量少

33．— Shall I go and buy more food and drinks for the party?

— No, we have prepared a fridge of those. That ______ be quite enough.

A．can

B．may

C．might

D．Should