题目

We were astonished________the temple still in its original condition. A . finding B . to find C . find D . to be found 答案：B如果X＝{x|－x＝0}，Y＝{x|＋x＝0}，那么X∩Y等于 [　　] A．0B．{0} C．D．{－1，0，1}