—______ is that girl?

—She's my friend, Mary. [ ]

A. Who

B. Where

C. How

绕经滑轮和卷筒的机构工作钢丝绳应优先选用（）。

A.点接触钢丝绳

B.线接触钢丝绳

C.面接触钢丝绳

D.顺绕钢丝绳