【单选题】______your book, and do this work first. You may read it later.
【单选题】甲状腺功能亢进的病人手术前进行喉镜检查,目的是检查( )
【单选题】your book, and do your work first. You may read it later.
【单选题】What should the woman do first?
B.
Put in the soap powder.
【单选题】一标准安装的渐开线外啮合标准直齿圆柱齿轮机构。已知传动比i12=1.5、中心距a=200mm、模数m=4mm、α=20°、ha*= 1。试计算该对齿轮的d1¢、d2¢。
A.
d 1 ¢ = 160mm d 2 ¢ = 240mm
B.
d 1 ¢ = 165mm d 2 ¢ = 245mm
C.
d 1 ¢ = 166mm d 2 ¢ = 248mm
D.
d 1 ¢ = 168mm d 2 ¢ = 250mm