①△ABE≌△DBC；②∠DMA=60°；③△BPQ为等边三角形；④PQ∥AC．
其中结论正确的有（ ）
下列建筑分别代表的宗教是（ ）
某小河边有四座工厂：甲、乙、丙、丁（如图所示）．已知，它们所排出的废液里分别含有Na2CO3、FeCl3、Ca（OH）2、HCl中的一种．某环保小组对河水监测时发现：①甲处河水呈乳白色②乙处河水呈红褐色浑浊状③丙处河水由浑浊变清④丁处河水产生气泡，河水仍澄清．
请推断：
（1）四座工厂排出的废液里含有的污染物是甲____ ，乙____ ，丙 ____ ，丁____ ．
（2）在M处取出的河水中，肯定大量存在的离子有____ ．
（3）用离子方程式表示丙除河水变澄清的原因：____ ．
下列文学名著的表述，正确的一项是（ ）
There is a park near my home. People like to go to this park after work. Some of them go to the park every day. Look! This is Mr. King. He is sitting on a chair and watching the children. Some children are playing a game. Some boys are playing football. Lucy and Lily are standing under a big tree. They are talking about their favorite movies. There is a small river in the park. We can see some boats on the water. Some children are sitting in the boats with their parents. Listen! A girl is singing. It's really a nice park. I come here every day.
