皮皮学，免费搜题
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【单选题】
荧光鉴别法用哪种仪器A.
薄层色谱扫描仪
B.
高效液相色谱仪
C.
紫外光灯
D.
旋光仪
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皮皮学刷刷变学霸
举一反三
【单选题】All the letters _____, Bethe took them to the post office.
A.
had been writing
B.
having been written
C.
wrote
D.
had written
【单选题】The couple had been trying to satisfy all the needs of their only youngster, who had been______for more pocket money all the time.
A.
supposing
B.
pleading
C.
trailing
D.
devising
【单选题】关于血管外溶血，正确的是 A、常见于ABO的不同型输注
B.
由IgM抗体引起
C.
多为ABO以外不同血型输注，由IgG抗体引起
D.
在输血后立即发生
E.
高效价抗-A、抗-B引起
【简答题】The millions of calculations involved, had they been done by hand, ________ all practical value by the time they were finished. A) had lost B) would lose C) would have lost D) should have lost
【简答题】_________ (后来发现)the lost book had been on the bookshelf all the time.
【单选题】The millions of calculations (involved) , (had they) been done by hand, would (lose) all practical value (by the time) they were finished.
A.
involved
B.
had they
C.
lose all
D.
by the time
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