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【判断题】
收不到闭锁信号是闭锁式高频保护动作于跳闸的充分条件。A.
正确
B.
错误
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反馈参考答案：
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
【多选题】关于Lewis血型抗体的描述,下列选项正确的是
A.
多为IgM型抗体
B.
只产生于Le（a-b-）个体的血清中
C.
Le（a-b+）个体一般不产生抗-Lea
D.
比较常见，可导致ABO血型定型困难
E.
临床较少出现Lewis抗体引起的HTR
【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.
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