It was October in 1982. A friend had business dealings in the city of Reno, Nevada. I was asked to 41 her on an overnight trip. While she conducted her 42 , I was 43 wandering down Virginia s
从王安石变法中改革科举考试的内容，废除以华而不实的诗赋辞章取士的旧制，参加经 义策论的考试，可以看出王安石变法 A.主要是解决财政问题
How different my hometown is _______ what it was ten years ago! A. from B. at C. With D. by
已知实数a、b是方程x2+2x-2010=0的两根,求a2+3a+b的值。
如图，在Rt△ABC中，∠C=90°，BC=5，AC=12，M为斜边AB上一动点， 过M作MD⊥AC，过M作ME⊥CB于点E，则线段DE的最小值为 ．
The first day of school our professor introduced himself and challenged us to get to know a new classmate. I stood up to 1 when a gentle hand 2 my shoulder. I turned around to find a wri
人进行呼吸时，呼出的气体和吸入的气体相比，其变化是 ①温度升高 ②水分增加 ③氧含量略增加 ④二氧化碳含量减少⑤二氧化碳含量增加 A.
设η服从N(1.5,22),试求： (1)P(η＜3.5};(2)P(η＜-4);(3)P(η≥2);(4)P(｜η｜＜3）.
