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【单选题】
初产妇送人产房准备接产的时间是A.
开大2cm
B.
开大4cm
C.
开大6cm
D.
开大8cm
E.
开大10cm
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反馈参考答案：
举一反三
【简答题】一个合数至少有( )个因数,一个质数只有( )个因数。
【简答题】质数只有( )个因数,合数至少有( )个因数,( )既不是质数也不是合数。
【单选题】I am a very lucky girl and my family is the nicest in the world. Mummy and Daddy are important of course and when we're out we have to behave properly but when we're at home we play and laugh and have...
A.
the children of the family are disciplined
B.
their parents are the nicest in the world
C.
Mummy is good at telling jokes
D.
Daddy is cautious and happy
【单选题】— Will you read me a story, Mummy? — OK. You _____ have one if you go to bed as soon as possible. [ ]
A.
might
B.
must
C.
could
D.
shall
【简答题】质数只有（ ）个因数，合数至少有（ ）个因数． A.1 B.2 C.3．
【简答题】已知一棵二叉树如下图所示,写出对该树先序遍历、中序遍历和后序遍历的结果。
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