皮皮学，免费搜题
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搜题
【单选题】
脐带中的动脉数是A.
5条
B.
4条
C.
3条
D.
2条
E.
1条
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皮皮学刷刷变学霸
举一反三
【单选题】Nolan believes that young students should be trained to conform rather than to think for themselves because ____.
A.
they will make trouble if they think for themselves
B.
they are too young to think for themselves
C.
passing examinations is too important
D.
they are not intelt enough
【简答题】______是扩展词汇范畴的范畴,______是第一个被扩展的范畴。