we must clean our classroom every day .（改为一般疑问） we have rules (at school).(括号内提问）
题目
we must clean our classroom every day .（改为一般疑问） we have rules (at school).(括号内提问）
the flowers in the park are (very beautiful).(括号内提问)
答案
Must you clean your classroom every day?
Where do you have rules?
How are the flowers in the park?
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已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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