问题 不定项选择
不定项选择
2008年我国南方遭到了特大冰雪灾害,高压供电线路损坏严重。在维修重建过程中,除了增加铁塔的个数和铁塔的抗拉强度外,还要考虑尽量减小线路上电能损耗,既不减少输电动率,也不增加导线质量,对部分线路减少电能损耗采取的有效措施是(   )
A.提高这部分线路的供电电压,减小导线中电流

B.在这部分线路两端换用更大匝数比的升压和降压变压器

C.在这部分线路上换用更优质的导线,减小导线的电阻率

D.多增加几根电线进行分流

答案

ABC

阅读理解

Dr.Ferguson energetically pushed the preparations for his departure,and in person directed the construction of his balloon.For a long time past he had been applying himself to the study of the Arab language and the various Mandingoe idioms,and,thanks to his talents in language,he had made rapid progress.

In the meanwhile,his friend,the sportsman,never let him out of

his sight-afraid,no doubt,that the doctor might take his departure,without saying a word to anybody.On this subject,he tried to discourage him with the most persuasive arguments,which,however,did NOT persuade Samuel Ferguson,and wasted his breath,by which the latter seemed to be but slightly moved.In fine,Dick felt that the doctor was slipping through his fingers.

The poor Scot was really to be pitied.He could not look upon the

blue sky without a wild terror: when asleep,he felt dizziness(眩晕)that made his head turn around;and every night he had visions of crashing down from immeasurable heights.

We must add that,during these nightmares,he once or twice fell out of bed. His first care then was to show Ferguson a severe bump(肿块)that he had received on the fall.“And yet,”he

would add,with warmth,“that was at the height of only three feet一not an inch more一and such a bump as this! Only think,then!”

This appeal,full of sad meaning as it was,did not seem to touch the doctor's heart.Not even the shadow of a doubt was ever suggested;and Samuel made an intolerable misuse of the first person plural:“‘Our’balloon,‘our’ car ;‘our’expedition.”

Dick trembled at them,although he was determined not to go ; he did not want to annoy his friend.Let us also disclose the fact that,without knowing exactly why himself,he had sent to Edinburgh for a certain selection of heavy clothing,and his best hunting-tools and fire-arms.

小题1:Why did Dr.Ferguson start to learn new languages?

A.To keep himself occupied.

B.To get ready for the departure.

C.To show his talent in language.

D.To Know more about balloon construction.小题2:We Call infer from the passage that Dick ____.

A.suffered from a disease during the nights

B.got hurt in a fall from the balloon in the evening

C.decided to take the adventure with the doctor at last

D.equipped himself with arms to frighten his friend小题3:Which word best describes Dr.Ferguson’s attitude towards his balloon flight?

A.Excited.

B.Optimistic.

C.Worried.

D.Determined小题4:What’s the writing pattern of the passage?

A.News.

B.Fiction.

C.Journal.

D.Biography.

单项选择题 A1型题