介入教学是一种（）
A.教学方法
B.教学技能
C.学习方法
D.教学技能训练法
参考答案：D
--- Did you hear that Malaysia Airline Flight MH307 disappeared off the coast of Australia
--- ______ bad news it is!
A．How
B．How a
C．What
D．What a
显示器按显示像素的直径，最清晰的是______。
A．0.39mm
B．0.28mm
C．0.25mm
D．0.31mm
