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- 1如图,四个完全相同的弹簧都处于水平位置,它们的右端受到大小皆为F的拉力作用,而左端的情况各不相同:①中弹簧的左端固定在墙上,②中弹簧的左端受大小也为F的拉力作用,③中弹
- 2已知ab互为相反数cd互为倒数x的绝对值等于1 3x-(a+b+cd)x的值 (a+b)×c/d-
- 3ann has been so busy these days ___she has no time to play with her friends
- 4请问函数y=根号x^2-4x+9的定义域是多少?
- 5(2003/1-1)(2002/1-1)(2001/1-1)(2000/1-1)(1999/1-1)...(1001/1-1)(1000/1-1)的积
- 610.观察下列格式-a,1/2a的二次方,-1/3a的三次方,1/4a的四次方,-1/5a的5次方…… (1)写出第n个式子;
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- 9Many students in our class,e() Lin Tao and Wang Lin,like playing football.
- 10设ω>0,函数y=sin(ωx+π3)+2的图象向右平移4π3个单位后与原图象重合,则ω的最小值是( ) A.23 B.43 C.32 D.3