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问题 选择题
通过一理想变压器，经同一线路输送相同的电功率P，原线圈的电压U保持不变，输电线路的总电阻为R．当副线圈与原线圈的匝数比为k时，线路损耗的电功率为P1，若将副线圈与原线圈的匝数比提高到nk，线路损耗的电功率为P2，则P1和分别为（　　）
A.   ，  B.R，  C.    ，  D.R，
答案

答案：D

选择题

这是什么交通标志？

A、易滑路段
B、急转弯路
C、反向弯路
D、连续弯路
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填空题

Part 4


Questions 26-45


·Read the following text and decide which answer bestfits each space.
·For questions 26-45, mark one letter A, B, C or D on the Answer Sheet.

How to Tell Which Side You Favor


Brain researcher Ned Herrmann tested more than 7,000 people to find out which side of the brain they favored. He found a p relationship between hemisphere (26) and the way subjects made a (27) : left-brain-oriented subjects were more often lawyers, writers, bookkeepers, doctors, tax experts, etc. —jobs (28) with logical, language-related information. Those who favored the right hemisphere (29) out to be poets, politicians, musicians, architects, entrepreneurs, dancers and (30) —top executives. Herrmann’s studies showed that the most successful people in any (31) are those who use both the left and right brains.
One test for hemisphere dominance is to (32) how you turn your head and eyes when (33) questions asked by someone in front of you. Research suggests that if you generally turn to the left, you have a right-brain (34) ; if you turn to the right, (35) are you prefer work that (36) use of logic or language.
Another test for dominance involves directions for (37) a product. A left-hemisphere- oriented person usually follows instructions in a step-by-step (38) —from written sentence to written sentence. Someone with p right-side input will probably (39) the written directions and assemble the pieces by (40) the diagram or picture.
If you think you’re right-brained, (41) this teaser. Read the sentence below carefully and count the number of f’s:
FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC
STUDY COMBINED WITH THE EXPERIENCE OF MANY YEARS.
Did you find all six fs If not, don’t be surprised. Only 15 percent of those who take this test (42) .If you counted less than six—most count three—you probably (43) the f in each "of". Since "of" is pronounced "ov", the verbal left hemisphere took the verbal (44) and overrode the right, "seeing" hemisphere; (45) forcing the wrong conclusion.

A．clue

B．action

C．advice

D．offer
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