成人心肺复苏抢救时胸外按压与人工呼吸通气的比例:
B
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Byjointeffortswecan___bothfriendshipandbusiness.()
IonlycalledthepolicewhenI________everythingelse.
―________finedayitistoday!
In1950,oneoftheleadingAmericanwriters()wasawardedtheNobelPrizefortheanti-racistIntruderintheDust.
WenotefromyourletterofSeptember10ththatyouareinterested____walnutmeat.