猜你喜欢
- 1y=2sin^2x/2-2根号3sinx/2cosx/2 的函数周期
- 21.已知x>0,y>0,且4/x+9/y=1,则x+y的最小值为多少 2.设x,y满足x+y=20,且x>0,y>0,求2xy的最大值
- 3me most was that the young boy who had lost both arms in an acccident could handle a pen with feet,
- 4英文造句:用下列单词或词组分别造一个句子(最好是复合句) 1.update 2.interview sb 3.have an in...
- 5英语翻译
- 6静静地海边踩在沙滩上吹着海风听着海浪她在哪里
- 7do you have a car?yes----car is black and white.
- 8求一篇以“声音”为话题的文章
- 9把反问句改成陈述句,把陈述句改成反问句的步骤和方法?
- 10(3乘5)分之1+(5乘7)分之1+(7乘9)分之1+……+(97乘99)分之1=?