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【单选题】
A1/A2型题]患者,女性,25岁,确定怀孕,首次产前检查的时间妊娠A.
12
B.
16
C.
20
D.
24
E.
28
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反馈参考答案：
举一反三
【单选题】(2分)概率密度曲线和直方图曲线的主要区别是 ?
A.
直方图曲线的计算方法与概率密度曲线的计算方法不相同；
B.
直方图曲线的形状与概率密度曲线的形状不相同；
C.
直方图曲线上的值大于概率密度曲线；
D.
概率密度曲线的积分为1，直方图曲线的积分部位1；
【单选题】Please wake me up if I ___ when you ___.
A.
still sleep, come
B.
am still sleeping. Come
C.
still sleep, will come
D.
am still sleeping, will come
【单选题】My teacher teaches us ________ in the school. [ ]
A.
to write and to read
B.
to write and read
【单选题】Part A Directions: You will hear 10 short dialogues. For each dialogue, there is one question and four possible answers. Choose the correct answer ― A, B, C or D, and mark it in your test booklet. You...
A.
He'll ask Steven when he talks to him.
B.
He wants to make sure the weather is clear.
C.
He isn't sure how many people will go.
D.
He doesn't know if there is single room.
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