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- 1尽管天气有雾,飞机还是起飞了.用英语怎么说
- 2已知函数f(x)=alnx x+1 +b x ,曲线y=f(x)在点(1,f(1))处的切线方程为x+2y-3=0. (Ⅰ)求a、b的
- 3That's not __ .Ican do it .A:easy enough B:enough easy C:difficult enough D:enough difficult
- 4设函数f(x)=2ax-a/x+lnx 若f(x)在(0,+无穷)上是单调函数,求a的取值范围
- 5Ann often _______(购物)with her parents at the weekend
- 6填空your voice sounds quite__(strange) 请注明原因
- 7Guess what I've been up to!是什么意思?
- 82,3,4,5,6,7,8这几个数字组成一个乘法算式,_ 0 _×_ _=_ _ _ _
- 9Because you I don't know how to let anyone else in my heart、求大神帮助
- 10如图,BD是∠ABC的平分线,DE⊥AB于E,S△ABC=36cm2,AB=18cm,BC=12cm,则DE的长是( ) A.2cm B.4cm C.1.2cm D.2.4cm