填空题

An investigation was made into the accident, ______ (在此事故中有50人丧生).

【参考答案】

in which fifty people were killed
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The order of the CPR should be ______.
A (airway clearance. B (mouth-to-mouth breathing. C (chest compression)A. ABC

B. ACB

C. BAC

D. CAB
填空题
radiation
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