人体最基本最重要的气是
A．空气
B．卫气
C．元气
D．营气
E．以上皆不是
参考答案：C
巨核红细胞的发育规律是（）
A.细胞核由大到小
B.细胞由大到小
C.颗粒从无到有
D.染色质由细到粗
E.细胞质由少到多
---These grapes look really beautiful.
----They ______! See the price $3.99 a pound. Very expensive, aren’t they!
A．would
B．could
C．might
D．should
