问题
选择题
当温度降低到一定程度时，某些物质的电阻会变为零，这种物质叫做超导体．电流通过超导体时不发热，因此超导体的应用十分广泛．假如有室温环境中的超导体，可用它来制作
A．家用保险丝
B．白炽灯灯丝
C．电热丝
D．输电导线
答案
答案：D
室温环境中的超导体，它来制作输电导线。减小在输送电能的损失。所以选D。
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当温度降低到一定程度时，某些物质的电阻会变为零，这种物质叫做超导体．电流通过超导体时不发热，因此超导体的应用十分广泛．假如有室温环境中的超导体，可用它来制作
A．家用保险丝
B．白炽灯灯丝
C．电热丝
D．输电导线
答案：D
室温环境中的超导体，它来制作输电导线。减小在输送电能的损失。所以选D。
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| The 28-year-old had spent six years working nights while she gained her university degree during the day. When she finally graduated, she had her eye on a teaching 1 at a nearby primary school. With the help of her friends, she had an interview with the Head. "I noticed a tiny hole in one of my stockings earlier," she 2 . "I thought about changing them, but I knew I'd be late if I did. And by the time I got to the interview, 3 enormous. I walked in apologizing for not 4 ." The would be teacher didn't get the job. In fact one of her friends told her that the 5 only comment was:"If someone doesn't take the time to present her best 6 at an interview, what kind of 7 is she going to be?" First impressions are 8 ones. In other words, if you're viewed positively within the critical (关键的) first four minutes, the person you've met will 9 assume everything you do is positive. Leave the interviewer a bad impression, and often he will assume you have a lot of other unsatisfactory characters. Worse, he or she may not take the time to give you a second 10 . Most employers believe that those who look as if they care about themselves will care more about their jobs. | ||||
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