下列传动方式中,适用速度范围最广的是()
A.带传动
B.链传动
C.齿轮传动
D.蜗杆传动
参考答案:C
—Is Blake still absent from class —I think he______be punished if he goes on with it.
A. will B. must C. can D. shall
正常成年男性睾丸大小约为()。
A.长3~4cm,宽2~3cm,厚1~2cm
B.长4~5cm,宽1~2cm,厚2~3cm
C.长4~5cm,宽3~4cm,厚2~3cm
D.长5~6cm,宽4~5cm,厚2~3cm
E.长4~6cm,宽3~4cm,厚2~3cm