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【单选题】
关于抗毒素的使用，下列哪项是错误的A.
可能发生反应
B.
治疗时要早期足量
C.
用于紧急预防或治疗
D.
对过敏机体应采取脱敏疗法
E.
可作为免疫增强剂给儿童多次注射
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【简答题】One form. of lightening that ........ is ball lightening.
【简答题】A．They put the form. in a little plastic envelope. B．They put the form. under one of the windscreen wipers. C．They wait until the motorist returns. D．They will ask the motorist to go to their office f...
【简答题】根据短文内容，回答下列问题。 Once there were five beggars (乞丐). One was English, one Turkish, one Greek, one was an Arab and one was Persian. One day they met and decided to stay together, sharing what they had and...
【单选题】The word decathlon in paragraph 3 probably means _______.
A.
jumping
B.
five track and field events
C.
throwing
D.
ten track and field events
【单选题】______ matter in one form. is transmuted to another form, a phase change is said to have taken place.
A.
Such
B.
Then
C.
Whenever
D.
Seldom
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