________________，________________，此事古难全。（苏轼《水调歌头》）
I stepped out of the hospital. My heart was filled with sadness and regret. My former best friend, Faith, had just ___21____. She was only 16. ____22___, she was diagnosed with a terrible cancer in he
- This problem is far ________ me, I’m afraid I can't work it out. - Don't worry, we will help you. A. beyond B. beside C. behind D. between
79. There are only five minutes left before the train leaves. You should run _______ . A. fast as possible as you can B. as quickly as you can C. as fa
城市空间分布具有明显的阶段性，其发展演变与经济、社会发展密切相关。读“某城市空间不同阶段的发展演变模式图”，回答11～12题。 19．图中四个
质量分别为2m和m的A、B两个质点，初速度相同，均为v1．若他们分别受到相同的冲量I作用后，A的速度变为v2，B的动量变化为p已知A、B都做直线运动，则
分子间同时存在着引力和斥力，若分子间引力和斥力随分子间距离r变化规律分别是，，当分子力表现为斥力时，r必须满足（ ）A． B．
如图，DE∥BC交AB、AC于D、E两点，CF为BC的延长线，若∠ADE＝50°，∠ACF＝110°，则∠A＝ 度．
