不为软硬交替刮涂方法为（）。
A、软上硬收
B、硬上软收
C、硬上硬收
D、软上软收
参考答案：D
I learnt the bad news that another serious coal mine disaster happened a cold winter evening.[ ]
A. on
B. at
C. in
D. for
岗位技能工资标准的确定？
