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2020年九年级全册物理单元练习题:第十七章欧姆定律(人教版)
人教版九年级全册物理单元练习题：第十七章欧姆定律一、选择题 1.如图所示，电源电压保持不变，开关S 闭合后，灯L 1、L2都能发光，甲、乙两个电表的示数之比是3：5；当开关断开时，为了使灯L1、L 2都能发光，忽略灯丝电阻的变化，则甲乙两表（） A. 甲表为电流表，乙表为电压表，示数之比为3：2 B。甲表为电压表，乙表为电流表，示数之比为2：3 C。甲乙两表都为电流表，示数之比为5：2 D。甲乙两表都为电流表，示数之比为2：5 2、在学过欧姆定律后，同学们有以下认识，其中不正确的是（）
2020七年级英语下册Unit 8单元阅读专练(含答案)(人教版)
2020人教版七年级英语下册Unit 8单元阅读专练 Its easy to get lost in a strange city. Here are some tips(方法) to help you find the way and get to your destination(目的地)． Take a map with you when you go to a new place. If(如果) you lose your way，look at the map，youll find the
2020七年级英语下册Unit 7单元阅读专练(含答案)(人教版)
2020人教版七年级英语下册Unit7单元阅读专练 In England, people don’t often talk to each other when they travel. If you are on a bus or on a train, you can always see some people sitting and looking out of the window and other people reading books or newspapers. English p
2020七年级英语下册Unit 6 单元阅读专练(含答案)(人教版)
2020人教版七年级英语下册Unit6单元阅读专练 It’s a sunny and warm Sunday morning. My parents, my sister and I are all at home. My parents don’t have to go to work, and my sister and I don’t have to go to school. We are all in the yard (院子). Look! My father is cleaning his
2020七年级英语下册Unit 5 单元阅读专练(含答案)(人教版)
2020人教版七年级英语下册Unit5单元阅读专练 Unlike some shy animals or some scary ones，dolphins often look like peoples friends.They are close and friendly to people.In the ocean(海洋) park，we can see dolphins play with people in the water.Dolphins are also very smart.Peopl
2020七年级英语下册Unit 4 单元阅读专练(含答案)(人教版)
2020人教版七年级英语下册Unit4单元阅读专练 Hi,boys and girls! Welcome to our museum. It’s free.You don’t have to pay any money.But we have some rules for you. Please remember them and do as I say. Firstly,don’t have food or drink here. You may make our museum dirty. Seco
2020七年级英语下册Unit 3 单元阅读专练(含答案)(人教版)
2020人教版七年级英语下册Unit3单元阅读专练 Tom lives in theUK. His friend Jack is inDubai. He will go to see his friend. First he needs to go toLondonto take the plane. On Friday morning, Tom takes a bus to the train station. It takes Tom about 30 minutes to get there.
2020七年级英语下册Unit 2 单元阅读专练(含答案)(人教版)
2020人教版七年级英语下册Unit2单元阅读专练 Sam: I know a new Thai restaurant (泰国餐馆). Let’s go there on Wednesday evening. Mary: Wednesday isn’t a good day. I finish work at 5:30 p.m. and then I need to go to the music club. Sam: What about Thursday? Mary: That’s not a
2020七年级英语下册Unit 1 单元阅读专练(含答案)(人教版)
2020人教版七年级英语下册Unit 1 单元阅读专练 Yao Ming is a basketball player. He is from Shanghai, China. His father and mother are also basketball players. He himself is a Chinese professional (职业的) basketball player. Now he plays in the NBA in the USA. He is very tall
2020年七年级生物下册单元检测练习:第七章人体活动对生物圈的影响检测题(人教版)
人教版七年级生物下册单元检测练习：第七章人体活动对生物圈的影响检测题一、选择题（每小题3分，共45分） 1、为了合理利用和保护草原资源，以下措施中不宜采取的是（） A．营造草原防护林 B．将草原改为农田 C．兴修草原水利 D．合理开发和利用 2、2019年北京世园会，是中国规模最大、科技最先进、国际支持最多的一届，本次办会题是“绿色生活美丽家园”，生态环境的保护已引起全球关注，你认为下列观点不正确的是（） A．如果土壤和水环境遭到了污染，人类将受到严重的危害 B．为了保护环境，应该提倡垃圾