单选题（）, the motion would continue indefinitely once it had started.AWere there loss of energy by frictionBSince there be loss of energy by frictionCWere there no loss of energy by frictionDShould be no loss of energy by friction
单选题
（）, the motion would continue indefinitely once it had started.
A
Were there loss of energy by friction
B
Since there be loss of energy by friction
C
Were there no loss of energy by friction
D
Should be no loss of energy by friction
参考解析
解析：
暂无解析
相关考题：
If you had told her the truth, she ______, but she is now still in the dark. A. will not be angryB. would not be angryC. had not been angryD. would not have been angry
If I didn’t have to get up early, I( )out tonight, but I start work at 7.30 tomorrow. A. wentB. would goC. had goneD. am going
The rice ______ if you had been more careful.A. would not be burningB. would not burnC. would not have been burntD. would not burnt
You ______go home now. It's getting late.A. would ratherB. had ratherC. would betterD. had better
一If he________，he __________that food.一Luckily he was sent to the hospital immediately.A. was warned;would not takeB. had been warned;would not have takenC. would be warned; had not takenD. would have been warned; had not taken
It's high time you _____.A. start to workB. would start to workC. started to workD. had started to work
While I _____ television, the door bell _____.A. watched/would ringB. would watch/had rungC. was watching/rangD. had been watched/was ringing
If he()that the mushroom was poisonous, he ()it.Luckily he was sent to the hospital immediately. A、was warned, would not eatB、had been warned, would not have eatenC、would be warned, had not eatenD、would have been warned, had not eaten
Once a week my aunt would announce, "I am going to have my bath today."Now most people find it fairly simple to have a bath.You probably remember how it goes.You enter the bathroom, you put the plug in, turn on the hot water, get into the bath, wash, sing, get out, dry yourself and exit.My aunt's approach was more epic(宏大的), like one of those long Eisenstein films where people seem to be climbing up the same flight of stairs forever.My aunt would first slowly collect her clean linen(亚麻布衬衫), so as to have it all ready for changing into after her bath.This involved sorting out her linen, which took up most of the morning.Sometimes she would find an old letter buried among her linen, become interested in the memories it aroused and have to postpone the bath until the next day.But if all went well, she would have a bite of lunch and start Phase Two around two o'clock.Phase Two was washing out the bath.She would wash the bath very thoroughly, rinse(冲洗) it with running cold water, rewash it and then carefully feel the whole surface with her fingers.If there was the slightest blemish, she would clean the whole bath out again.This took about an hour.Then she would fill the bath.By this time she was feeling a bit hungry and exhausted.So she would put on the kettle for a cup of tea.Several cups of tea and several cream crackers (her favourite food) later, she would go back to the bathroom.And find the water stone cold.1.According to the writer, most people().A.read magazines in the bathB.make bath time a special occasionC.sing when they are in the bathD.have a bath once every other week2.The writer's aunt().A.never got used to taking a bath regularlyB.always treated bathtime as an eventC.hated climbing the stairs to the bathroomD.would collect her new linen quickly3.How did she use to spend most of the morning?()A.Reading old letters.B.Preparing lunch.C.Getting the bath water hot.D.Sorting out her linen.4.Why might the writer's aunt put off bathing until the next day?()A.She might get fascinated by an old letter.B.She would sometimes get too tired.C.She would sometimes have lunch instead.D.She might start ironing the linen.5.She would never fill the bath until she().A.had cleaned it at least three timesB.had had several cups of teaC.had polished it inside and outsideD.had made sure it was perfectly clean
If they ____ earlier than expected, they ____ here now. A. had started, would beB. started, might beC. had started, would have beenD. will start, might have been
If her marriage had not cut short her college education she _____ a teacher.A:would have beenB:would beC:had beenD:was
He must have had an accident, or he _____ thenA:would have been hereB:would be hereC:should be hereD:had just had
If you had told earlier, I _____ like that. A: would not have doneB: would not doC: would doD: didn't do
When did you start to feel terrible?-I started to feel terrible when I( ) in the garden.A. was workingB. had workedC. would workD. had been working
Which of the following conditional clause is a real condition________? A.If I had time, I would study FrenchB.If I have time, I will study FrenchC.If I had had time, I would have studied FrenchD.If I should have time, I would study French
It's very cold outside. You______ put on your overcoat.A、had better toB、would better toC、had betterD、would better
—Why didn‘t you buy a new car？ —I would have bought one if I _______ enough money. A. had B. have had C. would have D. had had
The manager ordered the work__________A．to start at onceB．to be started at onceC．start at onceD．started at once
Around two o’clock every night, Sue will start talking in her dream. It somewhat ________ us.A.bothersB.had bothereD.C.would botherD.bothereD.
As I keep saying, it’s difficult to _________off the merry-go-round once it’s in motion.A. hop B. bound C. jump D. skip
________，I would have gone to see him.A.Have I had timeB.Had I timeC.Had I had timeD.would I have had
（），we would have finished it then.A、If had we had better equipmentB、Had we had better equipmentC、Had had we better equipmentD、We had had better equipment
You work as a database administrator for Supportcenter.cn. When you tried to connect to the database， you received the following error： ERROR： ORA-12541：TNS：no_listener You found that the listener is not running on the server， so you issued the following command in the Listener Control utility to start the listener. lsnrctlSTART What statement is true？（）A、It would attempt to start the default listenerB、It would start the most recently created listener.C、It would display an error with a message asking for the listener name to be specified.D、It would show you a list of listeners and prompts for the listener name that you want to start.
单选题（），we would have finished it then.AIf had we had better equipmentBHad we had better equipmentCHad had we better equipmentDWe had had better equipment