分析一个if引导的英语句子,
题目
分析一个if引导的英语句子,
Each semester,Andrew Tom receives a term bill outlining his expenses:tuition,dorm fee,student center fee,recreation fee,resident activity fee,health insurance.If only the rest of his expenses were as easy to quantify.第二个句子是虚拟语气吗?
答案
是虚拟语气……是但愿的意思.如果……就好了
举一反三
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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