填筑沿河浸水路堤较适合的填料有（）
A、砂砾石土
B、亚砂土
C、亚粘土
D、碎（砾）石土
E、粉性土
参考答案：A, D
五棱柱共有______个顶点，______条棱，______个面，它的侧面展开图是______．
He disappeared last month, _____ we have heard nothing of him. [ ]
A. when
B. after which
C. from which
D. since when
