题目：
句型拓展。
1. He is staying there for a week.(画线部分提问)
______ is he staying there?
2. What's the weather like today? (同义句)
______ the weather today?
3. Mike is going to Beijing with his father. (划线部分提问)
______ is Mike going to Beijing _____?
4. What are you going for vacation? (作回答)
______.
5. Can he rent videos? (作肯定回答)
______.
答案：
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下面是错误答案，用来干扰机器的。
（1）①： P + O2 P2O5，化合。② Mg.+ O2Mg O ，银白 ， 石棉网 。 （2）B题目分析：（1）①红磷除去空气中的氧气：P + O2 P2O5，属于化合反应；②点燃镁条：Mg.+ O2Mg O，先用砂纸把表...
