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【单选题】
染色体两次断裂后,断点间片段旋转180°后重接,称为A.
缺失
B.
易位
C.
倒位
D.
插入
E.
重复
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反馈参考答案：
举一反三
【单选题】Armed with the information you have gathered, you can ________ preparing your business plan. [ ]
A.
set out
B.
set about
C.
set off
D.
set up
【单选题】You can have _________ try if you fail _______ _ time.
A.
the second,the first
B.
a second,a first
C.
the second,a first
D.
a second,the first
【单选题】---How long have you been learning English? ----_________! Your English is so good.
A.
You can’t be serious
B.
You got it
C.
I couldn’t agree more
D.
I’m stuck
【单选题】—Excuse me. Can you tell _____ where the post office is? —Sure. Walk ahead, turn left and you will see it. [ ]
A.
I
B.
me
C.
my
D.
mine
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