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【判断题】
梁的截面如图,其抗弯截面系数为W Z =BH 2 /6-bh 2 /6
A.
正确
B.
错误
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A.
body-building
B.
rewarding
C.
interesting
D.
entertaining
【多选题】以下关于亲子依恋说法正确的是()
A.
是婴儿寻求并企图保持与抚养者亲密的身体和情感联系的一种倾向
B.
起源于婴儿的生理性需求和社会交往的需要,是一种积极的情感联结
C.
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D.
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【单选题】What are the two speakers doing? A) They are registering in ahotel. B) One is sightseeing and the other is guiding the tour. C) They are spending their holidays together in Egypt. D) They are talking ...
A.
They are registering in ahotel.
B.
One is sightseeing and the other is guiding the tour.
C.
They are spending their holidays together in Egypt.
D.
They are talking about some wonderful sights in Cairo.
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【单选题】I have no idea ____ they are spending their holidays
A.
where
B.
which
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