请教一道英语填空题,谢谢!
题目
请教一道英语填空题,谢谢!
这是关于涉及到UFO的一小段填空题:
Radio stations and the police are often swamped _______ when something _______ is seen in the skies. Once an explanation is given, most people are happy to believe it. But some people are hard to convince. Are the authorities really telling the truth, or do they _____ something they aren't telling anyone else?
答案
with calls
unidentified,(wired or strange)
hide,(或者 cover)
不完全确定,不过感觉也算通顺.
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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