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【单选题】
Edward综合征的核型为A.
45 X
B.
47，XXY
C.
47，xx(xx)，+13
D.
47．XY(XX)，+18
E.
47，XY(XX)，+21
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【单选题】Luckily some friends living locally came to visit me regularly and I went home every weekend, or I________mad.
A.
was going
B.
would have gone
C.
would go
D.
had gone
【单选题】. Yesterday I missed my feet on the stairs and had a bad fall. Luckily it was nothing serious ___.
A.
however
B.
therefore
C.
also
D.
though
【简答题】如图所示为液相传质的三种形式,请分别写出a为________________;b为____________;c为_____________。
【单选题】I dropped my keys in the grass, but luckily Kate _______ them.
A.
spotted
B.
wept
C.
removed
D.
looked
【简答题】指出上图中的错误
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