英语单选 All the guest present ( )my father;s birthday party were his friends
题目
英语单选 All the guest present ( )my father;s birthday party were his friends
A to B at c with D in
答案
B
be present at有“出席……”的意思.
所有出席我爸爸生日宴会的人,都是他的朋友.
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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