水平防潮是在建筑底层附近一定部位的墙体中设置水平方向通长防潮层。()
参考答案:对
The reason ___ he is absent is ___he has a bad cold.
A.why; that
B.why; because
C.that; because
D.for; that
变更调车作业计划钩数的计算,下列说法不完整的是:()。
A.减少一钩算一钩,连续减少算一钩
B.有增有减,算增不算减
C.增加一钩算一钩
D.变更同一股道算一钩