Put the words in the correct place in each sentence.
题目
Put the words in the correct place in each sentence.
例:Astronauts have been to the the moon(already)
Astronauts have already been to the the moon.
1.They haven't been to Mars.(yet)
2.Many asteonauts have visited the space station.(already)
3.The spacecraft has reached Mars.(just)
答案
1.They haven't been to Mars.(yet)They haven't been to Mars yet.2.Many asteonauts have visited the space station.(already)Many asteonauts have already visited the space station.3.The spacecraft has rea...
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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.
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