(2013·安徽十校素质检测)His injuries are extremely serious，but he's expected to ________.

A．pull in

B．pull through

C．pull up

D．pull over

1岁6个月的小儿乳牙总数的推算应是（）。

A.6～8颗

B.8～10颗

C.10～12颗

D.12～14颗

E.20颗