— I hear that Lily's brother is a worker here.

— Look, the man _____ is working over there is her brother. [ ]

A. who

B. whom

C. what

D. which

关于惯性，下列说法正确的是[ ]

A.物体运动速度较大时不容易停下来，说明速度越大，惯性越大

B.运动的物体有惯性，静止的物体没有惯性

C.惯性是物体固有的属性，跟速度没关系

D.质量大的物体比质量小的物体惯性大