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96. 这题我没弄明白,the range of daily low temperature in June is 20 and 25 in July, what is the smallest range of the daily low temperature in the two month? 答案有 5, 20 , 25, 30 , 45
97. a rectangle coordinate, a circle inside, 问圆的周长?
1. 经过(2,0) 和(0,2) 2. 忘了
98. x+2y+3z=5 和 x +3y +5z=7 问x+y+z=? 3
99. 一个圆,X is the centure, XB is the radius, AC intersects with XB, the point of intersect is D, ADX=90度,DB=2, 半径多少?
100. 一个箱子60个球,绿色17个, 还有红球和蓝球,问你红球有几个? 好像选D
1. 从中随机抽取一个红球的概率和篮球的概率相等
2. 忘了, |
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