心肺复苏时胸外按压和人工通气的比率()
A.30:2
B.15:2
C.5:1
D.2:30
E.2:15
参考答案:A
我国的( )是中央税,是中央政府财政收入中仅次于增值税的第二大税种。
A.消费税 B.营业税 C.所得课税 D.关税
Many of the electric and electronic products we purchase and consume today are what some industrial experts call " homogeneous toys".
A.identical
B.homosexual
C.unrelated
D.distinguishable