用英语回答下列题目
题目
用英语回答下列题目
Riddles:
1.What is smaller than an insect's mouth?
2.What season is the most dangerous one?
3.What's too much for me,just right for two,but nothing at all for three?
4.On what day of a year do soldiers start wars in history?
5.How many feet are there in a yard?
6.Who tries to make others smile most of the time?
7.From what number can one take half and leave nothing?
8.What has hands but no feet,a face but no eyes,and tells but does not talk?
9.How many months have 28 days?
10.Which horses have six legs?
答案
Keys (I)
1.Anything it eats.
2.Autumn.Because it is also FALL.
3.A secret.
4.March fourth.When a war breaks out,they'll have to march forth.
5.It depends on how many people are standing in it.
6.A photographer.
7.The number 8.
8.Take away the upper half and 0 is left.
8.A clock.
9.All of them.Each month has its 28th day.
10.All horses have forelegs (four legs) in front and two in back,so they all have six legs.
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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