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1、Is 2x - 3y < x^2 ? (1) 2x -3y = -2 (2) x > 2 and y > 0 Answer: D
2、How much time did it take a certain car to travel 400 kilometers? (1) The car traveled the first 200 kilometers in 2.5 hours (2) If the car's average speed had been 20 kilometers per hour greater than it was, it would have traveled the 400 kilometers in 1 hour less time than it did. Answer: B
第一题没有什么思路。 第二题的Statement (2) 不知道为什么可以,感觉是一个方程里有两个未知数的。 |
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