电流强度的单位是()。 A.赫兹 B.欧姆 C.安培 D.伏特 E.瓦特 发布时间:2017-05-15 22:28 │ 来源:www.tikuol.com 题型:单项选择题 A1/A2型题 问题: 电流强度的单位是()。A.赫兹B.欧姆C.安培D.伏特E.瓦特
题型:单项选择题 A1/A2型题 完形填空。 It's Wednesday afternoon. School is 1 . The students are putting their books, pencil-boxes 2 their school bags. The teacher comes in and says to the students, "Don't go, children. I have 3 to tellyou. Listen to me. Tomorrow is 4 . There is going to 5 a parents' meeting in our school. The meeting begins at nine o'clock in the morning. 6 are your school reports and letters to your parents. 7 them back home. Give your parents the letters and 8 them your school reports. Ask them 9 to the meeting tomorrow, because I'm 10 say something about next term.( )1. A. up ( )2. A. into ( )3. A. anything( )4. A. Monday ( )5. A. have ( )6. A. There ( )7. A. Bring ( )8. A. show ( )9. A. come ( )10. A. going B. on B. to B. nothing B. ThursdayB. is B. This B. Carry B. watch B. to come B. go to C. under C. on C. somethingC. Friday C. be C. That C. Take C. see C. coming C. will D. over D. out D. everything D. Tuesday D. has D. Here D. Make D. look D. comes D. going to 查看答案
题型:单项选择题 A1/A2型题 如图所示,A、B两小球由绕过轻质定滑轮的细线相连,B、C两小球在固定的光滑斜面上通过劲度系数为k的轻质弹簧相连,c球放在垂直于斜面的光滑挡板上.现用手控制住A,使细线刚刚拉直但无拉力作用,并保证滑轮左侧细线、弹簧均与斜面始终平行.已知A、B、C的质量均为m,重力加速度为g,细线与滑轮之间的摩擦不计,开始时整个系统处于静止状态,释放A后,A竖直向下运动至速度最大时C恰好离开挡板.下列说法正确的是( )A.斜面倾角α=30°B.斜面倾角α=60°C.A获得最大速度为gmkD.A获得最大速度为gm2k 查看答案
题型:单项选择题 A1/A2型题 新生儿化脓性脑膜炎()A.不吃不哭,反应差,口吐泡沫,面色发绀,脑脊液外观清B.不吃不哭,反应差,哭声尖叫,阵发性青紫,脑脊液外观红C.不吃不哭,反应差,面色青灰,脑脊液外观混D.不吃不哭,反应差,面色青灰,脑脊液外观清E.不吃不哭,反应差,牙关紧闭,苦笑面容,脑脊液外观清 查看答案