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- 1按规律填数 1 1 2 3 5 9 13 ()()该如何填?
- 2It is one thing to enjoy listening to good music,but it is quite _____ to perform skillfully yourself.
- 3二次函数y=2x^2+mx-5在区间(-∞,-1)上是减函数,在区间(-1,+∞)上是增函数.则m的值为多少
- 4足球场的草坪是真的还是假的?
- 5过点(1,0)且倾斜角是直线x−3y−1=0的倾斜角的两倍的直线方程是 _ .(直线方程写为一般式)
- 6如何判断分子中原子的未成对电子数?急
- 7已知X-Y不等于0,X^2-X=7,Y^2-Y=7,求X^3+Y^3+X^2Y+XY^2的值
- 8after class ,tom gives his picture ____ the teacher.A in B at C to D on
- 9甲乙两港水路长480千米,一只穿从甲港到乙港顺水6小时到达,从乙港到甲港8小时到达,船在静水中的速度和水流
- 10描写梅兰竹菊的古诗?