填空题
Push downward about ______ times a minute when you do chest compression.
【参考答案】
60 to 80
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单项选择题
A.LibraryB.ShopC.BankD.Supermarket
A.Library
B.Shop
C.Bank
D.Supermarket
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单项选择题
A.The pear.B.The weather.C.The sea food.D.The cold.
A.The pear.
B.The weather.
C.The sea food.
D.The cold.
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