What do you usually have _____ lunch? [ ]
A. to
B. at
C. for
答案:C
徒手肌力评级的依据包括()
A.年龄与性别
B.重力作用
C.疲劳程序
D.外加阻力
E.肌肉或肌腱的收缩
深孔的圆度精度等级不()IT9
A.低于
B.高于
C.大于
D.等于