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【单选题】
关于三胚层胚盘的描述,下列哪项错误A.
上胚层部分细胞增殖在胚盘一端中轴线上形成
B.
部分细胞增殖置换下胚层形成内胚层
C.
部分细胞增殖在上下胚层间形成中胚层
D.
内、中、外三个胚层均来源于
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反馈参考答案：
举一反三
【单选题】____________ the farmers were pleased with the good harvest of this year.
A.
A great deal of
B.
A great many
C.
A great many of D, A large amount of
【单选题】The prototype of British Parliament is
A.
the Great Council.
B.
the Great Parliament.
C.
the Great Charter.
D.
None of the above.
【单选题】A hard-working man _____ become a great scientist, but a great scientist _____ be a hard-working man.
A.
can’t, can
B.
may not, can
C.
can’t, must
D.
may not, must
【单选题】to have a picnic here! [ ]
A.
What great delight
B.
How great delight
C.
Whata great delight
D.
How a great delight
【单选题】Jasper is a great painter.He is ____ Picasso. [ ]
A.
the same great as
B.
as great painter as
C.
as great a painter as
D.
such great a painter as
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