放煤过程中,注意放煤口的放煤量,防止()而使运输机超载损坏机器。
A.放煤过少
B.放出矸石
C.放煤过多
D.煤块过大
参考答案:C
Jack has been working hard these days.It's obvious that there is ________he is eager for but didn't mention to us.
A.anything
B.something
C.nothing
D.everything
加涅认为,程序性知识包括心智技能和()两个亚类。