单项选择题

严重创伤患者抢救的“新黄金时间”指( ) A.
伤后10分钟 B.
伤后1小时 C.
伤后2-4小时 D.
重度创伤患者从院外转运至急诊出现生理极限前的一段时间

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单项选择题

The average time between two high waters is 12 hours and 25 minutes because this is the time it takes for ______.

A.A. The sun to be at the opposite side of the moon
B.B. The moon to be at the opposite side of the earth
C.C. The moon to be at its apogee
D.D. The sun and the moon to be on the same side

不定项选择

测定水样的SS时,必须进行单独采样。

A.正确
B.错误