there is a teacher and forty students in our cla
题目
there is a teacher and forty students in our cla
there is a teacher and forty students in our class否定句和一般疑问句和forty students划线提问
答案
否定句：There is no teacher and student in our class.一般疑问句：Is there a teacher and 40 students in your class?划线提问：How many students are there in your class?
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．
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