您所在的当前位置：初中物理试题 >

电荷

> 在家庭电路中从进户线到用电器之间应有总开关、电能表和熔断器，它们的先后顺序是 A.熔断器、电能表、总开关 B.总开关、熔断器、电能表 C.电能表、总开关、熔断器 D.电能表、熔断器、总开关

问题：

发布时间：2024-09-13

在家庭电路中从进户线到用电器之间应有总开关、电能表和熔断器，它们的先后顺序是

A.熔断器、电能表、总开关
B.总开关、熔断器、电能表
C.电能表、总开关、熔断器
D.电能表、熔断器、总开关

参考答案：

提问用户：6n***yHh

可能感兴趣的题目：

1 2008年夏季奥运会在下列市举行． A.上海 B.北京 C.伦敦 D.东京
2 Try to use bank cards if possible and avoid ______ too much money with you. A．to bring B．bringing C．to bringing D．brought
3 近年来，山东已经成为我国北方地区重要的蔬菜生产基地之一。据下图及所学知识回答15—16题。小题1:大棚中生产的蔬菜的质量略逊于自然状态下生长的蔬菜，原因是大棚中 A．光照太强 B．热量不足 C．日温差较小 D．年温差较小小题2:近些年山东蔬菜基地的蔬菜销售量和销售范围都在扩大，主要得益于 A．该地的蔬菜质量好、品种多 B．该地的劳动力丰富且价格低廉 C．该地生产蔬菜的自然条件优越 D．交通运输及保鲜、冷藏条件的改善
4 （4分）以下是实验室制取氯气的装置，在图中饱和食盐水的作用是，浓硫酸的作用是，F中盛放的溶液是，起的作用是。
5 在由水电离产生的H +浓度为1×10 -13 mol/L的溶液中，一定能大量共存的离子组是 [ ] ①K +、Cl -、NO 3 -、S 2-； ②K +、Fe 2+、I -、SO 4 2-； ③Na +、Cl -、NO 3 -、SO 4 2-；④Na +、Ca 2+、Cl -、HCO 3 - ⑤K +、Ba 2+、Cl -、NO 3 - A．①③ B．③⑤ C．③④ D．②⑤
6 完形填空。 I live in Albuquerque, New Mexico. I used to give a lot of money to the homeless,feeling 1 for them. But as time passed, I became a mom with no home, a huge 2 , and hardly any income. As a result, I 3 giving money to the people on the side of the road and became very 4 . Things started to change for me 5 . I had a home, a backyard for my daughter,and plenty of food, and I started to 6 myself out of debt. One day we saw a homeless person with the 7 , "Will work for food." I 8 . My daughter commented. "Mommy, you used to always give money to those people in 9 ." I replied, "Honey, they just use that money for 10 , or other bad things." She didn"t respond. 11 when I said that, I didn"t feel right. Three days later, I was driving to 12 my daughter from school. A man was standing on the corner, and something deep 13 me said,"Just help the guy." So I 14 down my window, and he ran over excitedly. He said,"God bless you, I only need 77 cents." I 15 into my ashtray (烟灰缸) and strangely enough, there 16 three quarters and two pennies. I picked them up and gave them to him. He 17 with joy and tears in his eyes."Wow, you just made it 18 for me to see my mom for Christmas! Thank you so much; the 19 that had this great sale is leaving in 20 minutes!" It was a moment I"ll 20 forever. I think that man won"t forget it either, but I was the one who got the best gift in life-GIVING. ( )1. A. angry ( )2. A. debt ( )3. A. continued ( )4. A. rich ( )5. A. slowly ( )6. A. save ( )7. A. determined ( )8. A. ran away ( )9. A. danger ( )10. A. life ( )11. A. And ( )12. A. bring up ( )13. A. on ( )14. A. rolled ( )15. A. reached ( )16. A. hid ( )17. A. stood up ( )18. A. possible ( )19. A. plane ( )20. A. thank B. sorry B. burden B. appreciated B. pleased B. immediately B. pull B. sign B. turned back B. love B. book B.So B. carry out B. inside B. pushed B. went B. stood B. turned up B. meaningful B. bus B. respect C. grateful C. disease C. hated C. relaxed C. quickly C. run C. child C. passed by C. need C. food C. But C. pick up C. behind C. blew C. knocked C. slept C. set out C. wonderful C. woman C. remember D. strange D. problem D. stopped D. bitter D. greatly D. feed D. advertisement D. sped up D. sadness D. smoking D. Even D. take out D. over D. took D. shouted D. sat D. burst out D. interesting D. man D. hold
7 汽车从静止开始出发，在水平路上做匀加速直线运动，通过相距为38.4m的甲乙两地需8s，经过乙地的速度是经过甲地速度的2倍，求汽车的加速度和甲地离汽车出发处的距离。
8 “神舟”六号载人飞船的成功发射和顺利返回，标志着我国航天事业又迈上了一个新的台阶。为了比较该飞船和地球同步卫星的运行情况，某同学通过互联网了解到“神舟”六号在高度为343km圆周轨道上运行一周的时间大约是90 min。由此可知 A．“神舟”六号在该圆周轨道上的运行周期比同步卫星的运行周期短 B．“神舟”六号在该圆周轨道上的运行速率比同步卫星的运行速率小 C．“神舟”六号在该圆周轨道上的运行加速度比同步卫星的运行加速度小 D．“神舟”六号在该圆周轨道距地面的高度比同步卫星轨道距地面的高度小
9 函数y=cos（ π 3 - 2 5 x）的最小正周期是（　　） A． π 5 B． 5 2 π C．2π D．5π
10 当别人夸奖你字写得好时，你应说：________． A.Oh B. no C.Thank you D.Not good E.sorry