题目

关于硅的说法中，不正确的是 A.硅是地壳中含量较丰富的元素B.在自然界里，硅存在于各种矿物质和岩石中的形式是硅酸C.晶体硅的结构与金刚石相似，都具有较高的熔沸点D.晶体硅是良好的半导体材料 答案：BDo you know ______________ had reported the accident to the police?A．who it was thatB．who was it thatC．it was who thatD．that it was who