题目

如图所示，直线OAC为某一直流电源的总功率P总随电流I变化的图线，抛物线OBC为该电源内部热功率Pr随电流I变化的图线．外电路是纯电阻，则根据图线可知（  ）A．电源电动势为6VB．电源内阻为1.5ΩC．当电路中电流为1A时，外电路的电阻为1.5ΩD．在O→C过程中，电源输出功率的变化是先变大再变小  答案：BCD解析: Eighty-year-old retired tailor, James McKay, spent Saturday night in jail after      thirty-year-old Keith Smith over the head      his walking stick. McKay's wife, Laurence told us that while McKay is usually a        person, he had been        to this act of violence by getting wet just once too often. Smith lives above the McKays and it appears that not only is he a keen gardener, he is also a        collector. Unfortunately for him, the water he sent over his balcony every day ended up on the McKay's, or too often, on the McKays       .“For the last fortnight, since Smith moved into the flat above us, we have hardly dared to go to our       ,” said Laurence. She added that it wasn't so much the water falling onto their balcony from Smith watering his plant        bothered them, it was more the way he cleaned his fish tanks. “We'd be        there happily reading our newspapers, when        so much water would come from above that we'd be as wet as if we'd        with our clothes on! Neither could we get rid of the        of fish!”And on Saturday evening it was just too       . “It was James's birthday,” explained Laurence, “and I'd made him a birthday cake. The candles were a great sight as you can imagine, but James didn't get to blow them out.”       , Smith emptied one of his larger tanks over his balcony and both the McKays and the cake were wet       . Rarely had Laurence seen McKay move so fast. “I couldn't        him. He was up there in a flash. It was the fastest I'd seen him move since 1964.”Smith is not going to take things further with the police. He has also promised to change his        from now on. And what of James McKay?        he left the police station, a large crowd of supporters sang him, “Happy Birthday”. “      the most exciting birthday       !” said the cheerful old man. “The best since my adolescence I'd say!”         小题1:A．hittingB．tappingC．pushingD．touching小题2:A．byB．viaC．throughD．with小题3:A．quietB．peacefulC．sensitiveD．stubborn小题4:A．accustomedB．takenC．drivenD．attracted小题5:A．fishB．seedC．plantD．newspaper小题6:A．himselfB．itselfC．themselvesD．herself小题7:A．bathroomB．kitchenC．bedroomD．balcony小题8:A．whichB．whatC．thatD．whether小题9:A．sittingB．exercisingC．sleepingD．eating小题10:A．regularlyB．unconsciously C．preciselyD．suddenly小题11:A．swumB．showeredC．wateredD．drowned小题12:A．tasteB．senseC．feelingD．smell小题13:A．littleB．soonC．lateD．much小题14:A．BesideB．InsteadC．OtherwiseD．Consequently小题15:A．overB．acrossC．throughD．down小题16:A．stopB．blameC．ignoreD．stand小题17:A．viewsB．attitudeC．waysD．mind小题18:A．WhileB．SinceC．UntilD．As小题19:A．SincerelyB．ImpossiblyC．DefinitelyD．Previously小题20:A．beforeB．everC．alreadyD．since