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
