1 |
x-1 |
a |
2-x |
2a+1 |
x2-3x+2 |
2-x-a(x-1) |
(x-1)(2-x) |
2a+1 |
x2-3x+2 |
2-x-a(x-1) |
(x-1)(x-2) |
2a+1 |
x2-3x+2 |
|
1 |
3 |
49 |
50 |
49 |
50 |
A.
| B.
| C.1 | D.
|
A.某市“明天降雨的概率是75%”表示明天有75%的时间会降雨 | ||
B.随机抛掷一枚均匀的硬币,落地后正面一定朝上 | ||
C.在一次抽奖活动中,“中奖的概率是
| ||
D.在平面内,平行四边形的两条对角线一定相交 |
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