In doing mouth-to-mouth breathing, you have to ______ .
A.open your mouth wide
B.take a deep breath
C.blow into his lungs
D.do' all of the above
第8题
A.生军
B.淡大芸
C.仙灵脾
D.天花粉
E.千张纸淫羊霍的别名()大黄的别名()肉苁蓉的别名()木蝴蝶的别名()
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