B.一键最大制冷
C.风量调节
D.内外循环切换
第4题
如图3,在利用K型热电偶和某智能温度表(该温度表具有冷端温度补偿功能)进行测温,如果回路的热电势此时等于1.030mv,冷端温度为T0=10℃,则温度表显示值为( )℃。计算结果精确到小数点后第1位。K型热电偶分度表如表2所示。图3 表2 工作端 热电动势(mV) 温度℃ 0 1 2 3 4 5 6 7 8 9 -10 -0.392 -0.431 -0.469 -0.508 -0.547 -0.585 -0.624 -0.662 -0.701 -0.739 0 0 -0.039 -0.079 0.118 -0.157 -0.197 0.236 -0.275 -0.314 -0.353 0 0 0.039 0.079 0.119 0.158 0.198 0.238 0.277 0.317 0.357 10 0.397 0.437 0.477 0.517 0.557 0.597 0.637 0.677 0.718 0.758 20 0.798 0.838 0.879 0.919 0.960 1.000 1.041 1.081 1.122 1.162 30 1.203 1.244 1.285 1.325 1.366 1.407 1.448 1.489 1.529 1.570 40 1.611 1.652 1.693 1.734 1.776 1.817 1.858 1.899 1.940 1.981
第7题
2. Professor Taiju Matsuzawa wanted to find out why otherwise healthy farmers in northern Japan appeared to be losing their ability to think and reason at a relatively early age, and how the process of ageing could be slowed down.
3. With a team of colleagues at Tokyo National University, he set about measuring brain volumes of a thousand people of different ages and varying occupations.
4. Computer technology enabled the researchers to obtain precise measurements of the volume of the front and side sections of the brain, which relate to intellect(智能)and emotion, and determine the human character. (The rear section of the brain, which controls functions like eating and breathing, does not contract with age, and one can continue living without intellectual or emotional faculties. )
5. Contraction of front and side parts--as cells die off--was observed in some subjects in their thirties, but it was still not evident in some sixty and seventy-year-olds.
6. Matsuzawa concluded from his tests that there is a simple remedy to the contraction normally associated with age--using the head.
7. The findings show in general terms that contraction of the brain begins sooner in people in the country than in the towns. Those least at risk, says Matuzawa, are lawyers, followed by university professors and doctors. White collar workers doing routine work in government offices are, however, as likely to have shrinking brains as the farm worker, bus driver and shop assistant.
8. Matsuzawa's findings show that thinking can prevent the brain from shrinking.
Blood must circulate properly in the head to supply the fresh oxygen the brain ceils need. "The best way to maintain good blood circulation is through using the brain", he says, "Think hard and engage in conversation. Don't rely on pocket calculators."
A. Thinking can prevent the brain from shrinking.
B. The reason why people are aging.
C. Scientists have worked out a way to keep people healthy.
D. Computer technology.
E. The different time of brain contraction between people in the country and in the towns.
F. Measurements of the volume of the front and side sections of the brain.
Para 1 ______.
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