题目：
试判断下列几个速度中哪个不是瞬时速度（）
A.子弹出枪口的速度是800m/s
B.小球第3s末的速度是6m/s
C.汽车从甲站行驶到乙站的速度是40km/h
D.汽车通过站牌时的速度是7.2km/h
答案：
参考答案：C
解析：瞬时速度表示经过某一位置或者某一瞬间时的速度大小，子弹射出枪口的速度指的是子弹经过枪口时的速度，为瞬时速度，第3s末表示时刻，所以为瞬时速度，从甲站到乙站是一段过程，所以为平均速度，通过站牌时的速度表示瞬时速度。
试判断下列几个速度中哪个不是瞬时速度（） A.子弹出枪口的速度是800m/s B.
来源：www.tikuol.com
题型：单项选择题
试题推荐
题型：单项选择题 共用题干题
男性，76岁，因前列腺增生行TURP术后第1天。一般情况好，无恶心、呕吐，无腹胀。行膀胱冲洗。
行膀胱冲洗的目的是（）
A.预防便秘
B.预防出血
C.预防感染
D.减轻疼痛
E.避免血凝块堵塞尿管
题型：解答题
36的全部因数是1、2、3、4、6、9、12和18，共有8个．______．
题型：综合题
图1 《 * * 党宣言》（1848年出版）
图2 巴黎公社成立大会
图3 攻打冬宫
（1）图1历史文献发表的重大历史意义是什么？
（2）图2所示的巴黎公社革命是社会主义理论到实践的一次伟大尝试，试分析巴黎会社的性质，并结合史实论证。
（3）巴黎公社留下的最重要的经验是什么？
（4）图3所示的十月革命的胜利，使社会主义由理想变成现实。你认为十月革命胜利的最主要的原因是什么？革命的胜利有何意义？
题型：完形填空
| 完形填空。 | ||||
| It was 4 o'clock in the morning, when I received the phone call. "This is the emergency room calling and your son was just 1 in with severe burns on his face, neck and arms. We've called for a (n) 2 and are going to fly him to the burn unit in Seattle." Seattle was 350 miles from his college, so we knew immediately this was 3 . The doctor described the accident, which caused the burns. At 6 am, our son and his friends decided to barbecue hamburgers. When they 4 the charcoal (木炭), it burst into flames because they had sprayed (喷洒) too much gasoline (petrol). The flames 5 my son's shirt tail and shot from his waist to his head. 6 , one of the boys was quick-minded, grasped my son, and rolled him on the grass. While it saved his life, it was not in 7 to save him from severe burns and the terrible scars (伤疤). So, he had to return to college with scars. When I was a child, my mother told my sister, who had a 10-inch, very 8 scar on her arm. "Ann, if you ignore the scar, other people will ignore it. It doesn't mean they won't 9 it, but it means it will not matter to them if it doesn't matter to you." I 10 this wisdom (智慧) on to my son. He took my advice to 11 and returned to school with his head held high-glad he was alive. By the end of the six-month waiting period, he decided that the scars did not matter, so he made the 12 to give up any plastic surgery (外科手术). We all have "scars" that 13 people to keep away from us. And we spend a lot of time thinking that if only we looked differently, or dressed differently, people would like us better. But you see, people will only judge you by your looks, or your clothes, if you are judging yourself by these same 14 standards (标准). Put your imperfections out of your 15 and concentrate (集中) on what you value within yourself, and your beauty will shine through. | ||||
|
题型：单项选择题
雷尼替丁治疗消化性溃疡的机制是
A．阻断胃壁细胞H2受体
B．抑制胃肠平滑肌收缩
C．阻断多巴胺受体
D．抗胆碱能神经
E．中和胃酸，减少对溃疡面的刺激
