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【单选题】
Which of the following has probably been a less important factor contributing to the trend of increasing isolationism in the United States?A.
terrorist attacks of September 2001
B.
unpopularity of the Iraq War within the American public
C.
protracted involvement of the United States in Afghanistan
D.
worsening economic conditions in the United States since 2007
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举一反三
【单选题】_____ is known to all that the Amber Room belongs to the Russians.
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As
B.
which
C.
It
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What
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A.
频分多路复用
B.
时分多路复用
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码分多路复用
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波分多路复用
【单选题】关于胆囊结石,下列哪一点是不正确的
A.
多为胆固醇为主的结石
B.
临床上可无症状
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超声检查能辅肋诊断
D.
混合性结石可在x线平片上显影
E.
首选的术式是胆囊切开取石
【单选题】What do we learn about Japan from the passage?
A.
It now belongs to the western hemisphere.
B.
Its economic situation perhaps goes even worse than the US.
C.
Its financial systems collapsed as other western countries did.
D.
Its economy will recover sooner than other Asian countries.
【单选题】______ is known to all，the Amber Room belongs to the Russians.
A.
As
B.
Which
C.
It
D.
What
【多选题】同聚物加尾连接法具有哪些优缺点？
A.
利用末端转移酶在载体及外源双链DNA的3’端各加上一段寡聚核苷酸，使其变为粘性末端；
B.
连接效率增高
C.
但容易发生自身环化
D.
方便 回收 外源片段
【单选题】关于胆囊结石,下列哪一点是不正确的:
A.
多为胆固醇为主的结石
B.
临床上可无症状
C.
超声检查能辅助诊断
D.
混合性结石可在X线平片上显影
E.
首选的术式是胆囊切开取石
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【单选题】_____ is known to all that the Amber Room belongs to the Russians.
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