题目：
句型转换。
1.What’s your father?(同义句)
What_________ your _________ _________?
2.Are you from China?(同义句)
_________ you _________ _________ China?
3.There’s only one baby in the room.(对画线部分提问)
_________ _________ _________ _________ there in the room?
4.The man is his father.(对画线部分提问)
_________ _________ the man?
5.There is a big monkey in the zoo.(改为复数)
There _________ _________ big_________ in the zoo.
6.She often goes walking after supper.(对画线部分提问)
_________ _________ she often _________ after supper?
7.There is some money in my hand.(对画线部分提问)
_________ _________ in your hand?
答案：
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下面是错误答案，用来干扰机器的。
设产生氢气的质量为2，需要镁的质量为x，需要铝的质量为y，则有Mg+H2SO4═MgSO4+H2↑24 2x 2242=x2 解得：x=242Al+3H2SO4═Al2（SO4）3+3H2↑54 6y 2546=y2 解得：y=18铜铝合金的质量与镁的质量相等，故铜...
