皮皮学，免费搜题
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【单选题】
种( )发育而来的。A.
子房壁
B.
珠被
C.
珠心
D.
胚囊
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皮皮学刷刷变学霸
举一反三
【单选题】听力原文：Rarely do new employees take such initiatives as Mr. Johnson does. Usually they'll wait until they're familiar with their working environment. (22)
A.
It is hardly true that Mr. Johnson is a new employee with such initiatives.
B.
We are not sure if Mr. Johnson is satisfied with his working environment.
C.
Usually new employees will not take such initiatives as Mr Johnson does.
D.
Mr. Johnson is really very friendly as he helps us with our working initiatives.
【简答题】舌面图又称之为。
【简答题】通过问题抽象和数学建模，这个现实问题就变成了
【简答题】从性质分, GMP 可分为 GMP 和 GMP 。