题目

如图所示的电路，电源电压为3V且保持不变，滑动变阻器R1标有“1A 10Ω”的字样。当滑动变阻器的滑片P在最右端时闭合开关S，通过灯泡L的电流为0.5A，移动滑动变阻器的滑片P，在电路安全工作的情况下，下列说法正确的是                        （    ） A．向左移动滑动变阻器的滑片P时灯泡变亮 B．滑片P在最右端时通过干路中的电流是0.9A C．R1消耗的电功率范围是1.5W～3W D．电路消耗的总功率范围是2.4W～4.5W Sophie's WorldSeveral days went by without any word from the philosophy（哲学）teacher. Tomorrow was Thursday, May 17-Nowway's National Day. School would be closed on the 18th as well. As they walked home after school, Joanna suddenly said, “Let's go camping! ”Sophie's immediate reaction（反应）was that she couldn't be away from the house for long. But then she said, “Sure, why not?"A couple of hours later, Joanna arrived at Sophie's door with a large backpack. Sophie had packed hers as well, and she also had a tent.When Sophie's mother got home around five o'clock, she gave them a sermon （指导）about what they must and must not do. She also insisted on knowing where they were going to set up camp.They told her they planned to head for Grouse Top. They might be lucky enough to hear the mating call of the grouse（松鸡）next morning.Sophie had a secret motive（动机）for choosing that particular spot. She thought that Grouse Top must be pretty close to the major's cabin（少校的木屋）. Something was driving her to return to it, but she didn't dare to go alone. he two girls walked down the path that led from the little cul-de-sac（street open at one end only）just beyond Sophie's garden gate. They chatted about this and that, and Sophie enjoyed taking a little time off from everything having to do with philosophy.By eight o'clock they had set up their tent in the open air by Grouse Top. They had prepared themselves for the night. When they had eaten their sandwiches, Sophie asked, “Have you ever heard of the major's cabin?"“The major's cabin?"“There is a but in the woods somewhere near here... by a little lake. A strange man lived there once, a major.”“Does anyone live there now?"“Do you want to go and see?"Joanna was not full of interest, but in the end they set out. The sun was low in the sky.1.Both Joanna and Sophie decided to ___________during their holiday.A.play games online B.go to the cinemaC.visit their friends D.go camping2.How did Sophie's mother feel about their plan?A.Surprised. B.Satisfied. C.Worried. D.Regretted.3.What can we know from the passage?A.Their holiday would last more than a week.B.They talked a lot about philosophy on the road.C.Joanna wouldn't go to the major's cabin with Sophie.D.Sophie had probably been to the major's cabin before.