炮孔中装药后,必须封堵炮泥,但下列情况严禁爆破()。
A.封泥不足
B.封泥不严
C.不使用水炮泥
参考答案:A, B, C
热拌沥青混合料摊铺有哪些要求?
______ mountains of homework,students today are busy with all kinds of activities.
A.In addition to
B.In spite of
C.As long as
D.Instead of