中国首次南极科学考察是从（）启航。 A.青岛 B.厦门 C.上海 D.大连 发布时间：2021-02-06 07:27 │ 来源：www.tikuol.com 题型：单项选择题 问题： 中国首次南极科学考察是从（）启航。A.青岛B.厦门C.上海D.大连
题型：单项选择题 完形填空. There are many different kinds of cars in the world. My aunt thinks this is because cars are 1 their drivers. She says, "Rich people have expensive cars, big people have large cars, and old people drive old cars." But I don't 2 with her. My neighbor, Mrs Hill, is 82 years old. She drives only on Tuesday, and she drives only to the bank. She 3 drives more than 30 kilometers an hour. Do you think Mrs Hill has a very 4 and small car? No, her car is new. It's very large, and it 5 go 200 kilometers for each hour! My friend is 6 . He draws beautiful pictures with lots of colors. But his car is black! Mrs Bates has a very, very old one. There is often something 7 with the car. Does she drive that kind of car because she is poor? No, she has four factories and 8 dollars in the bank. My aunt Mary has a very 9 car, though she drives to the country with her husband, her two children, her mother and their dog. Now you have 10 my friends and their cars. Do you agree with my aunt? Maybe you have a car. Does it say anything about you?( )1. A.for ( )2. A.like ( )3. A.never ( )4. A.old ( )5. A.may ( )6. A. a teacher ( )7. A. interesting ( )8. A. twenty ( )9. A. big ( )10.A. read about B. with B. look after B. always B. new B. can B. a reporter B. wrong B. two hundred B. small B. called C. like C. agree C. sometimes C. broken C. must C. a writer C. mistake C. two thousandC. expensive C. seen D. among D. chat D. often D. beautiful D. has to D. an artist D. trouble D. two millionD. new D. met with 查看答案
题型：单项选择题 如图所示电路，电源电压保持不变，变阻器滑片滑到c点时， 电压表示数为4V，灯L正常发光：当滑片P滑到b点时，电压 表示数为8V，已知灯L的电阻为4，电阻Rac=Rab／4，则灯L 的额定功率是A．16WB．8WC．4WD．2W 查看答案
，电阻Rac=Rab／4，则灯L 的额定功率是