催眠药应（）
A.黄酒冲服
B.饭前内服
C.睡前内服
D.饭后内服
E.定时内服
参考答案：C
190. What impressed me most was that they never__________even when they failed once again.
A．lost hearts
B．lost their heart
C．lost heart
D．lost their hearts
预应力材料的后张预应力筋通常不包括()。
A.钢绞线
B.精轧螺纹钢筋
C.钢丝
D.热轧带肋钢筋
