题目内容：
碱洗锅炉煮炉时，要向水中加入（）A．CA（OH）2
B．C.u（OH）2
C．NAOH或NA2CO3
D．A.L（OH）3
参考答案：
单选：碱洗锅炉煮炉时，要向水中加入（）A．CA（OH）2B．C.u（OH）2C．NAOH或NA2CO3D．A.L（OH）3
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A．CA（OH）2
B．C.u（OH）2
C．NAOH或NA2CO3
D．A.L（OH）3
A．CA（OH）2
B．C.u（OH）2
C．NAOH或NA2CO3
D．A.L（OH）3
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以下哪些景点或建筑坐落于颐和园中（）A．谐趣园B．万寿山C．鱼藻轩D．蝴蝶厅E．昆明湖
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