P-R间期正常值为
A.0.01sB.0.11sC.0.12sD.0.11~0.17sE.0.12~0.20s
参考答案:E
D
Which is NOT necessary for extreme ironing ( )
A.A real iron.
B.An ironing board
C.A handkerchief.
D.Clothes for ironin
增发央行票据属于扩张性货币政策。