—Who is your new head teacher this semester?

—The woman _______ is wearing a red skirt.[ ]

A. whom

B. who

C. whose

D. which

在水源缺乏的矿井，冰冻地区或不适合湿式打眼的要采取干式捕尘措施，干式捕尘方式分为（）。

A.带捕尘罩的孔口捕尘器

B.不带孔口捕尘罩的孔底捕尘器

C.密闭罩捕尘

D.局部除尘器

E.通风除尘