Do you play _____? [ ]
A. basketballs
B. a basketball
C. basketball
D. the basketball
答案:C
最小合数的倒数是( ),最小质数的倒数是( )。
车床工作精度车槽(切断)试验的目的,是考核车床主轴系统及刀架系统的抗振性能。( )