频率的变化主要取决于电力系统中()功率的平衡,频率低于50Hz表示系统中发出的()功

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问题:

频率的变化主要取决于电力系统中()功率的平衡,频率低于50Hz表示系统中发出的()功率不足。

考点:电厂全能值班员考试发电厂电气专业知识发电厂电气专业知识题库
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伯利克里在著名的《葬礼演说》中说“我们的政府形式之所以称为民主制,是因为 * * 不掌握在少数人手里,而是由全体人民掌握的”这段话反映出雅典民主制的基本特点是[ ]

A、人民主权

B、轮番而制

C、法律面前人人平等

D、民主面前人人平等

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实验室制取气体的装置如图所示,根据所学知识,回答下列问题:

(1)图中标有①②的仪器名称:①______;②______.

(2)写出用装置A制取氧气的一个化学方程式______;A装置中试管口略向下倾斜的目的是______.

(3)某同学用F装置集满一瓶氧气后,实验时发现氧气不纯,原因可能是______.

(4)实验室用石灰石和稀盐酸反应制取二氧化碳时,应选用图中______来组装一套实验装置,检验二氧化碳集满的方法是______.

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We can make mistakes at any age. Some mistakes we make are about money. But most mistakes are about people. "Did Jerry really care when I broke up with Helen?" "When I got that great job, did Jim really feel good about it, as a friend? Or did he envy my luck? “And Paul, why didn't pick up that he was friendly just because I had a car?" When we look back, doubts like these can make us feel bad. But when we look back, it's too late.

Why do we go wrong about our friends—or our enemies? Sometimes what people say hides their real meaning. And if we don't really listen we miss the feeling behind the words. Suppose someone tells you, "You're a lucky dog, "and that's being friendly. But "lucky dog"? There's a bit of envy in those words. Maybe he doesn't see it himself. But bringing in the "dog" bit puts you down a little, what he may be saying is that he doesn't think you deserve your luck.

"Just think of all the things you have to be thankful for" is another noise that says one thing and means another. It could mean that the speaker is trying to get you to see your problem as part of your life as a whole. But is he? Wrapped up in this phrase is the thought that your problem isn't important. It's telling you to think of all the starving people in the world when you haven't got a date for Saturday night.

How can you tell the real meaning behind someone’s words? One way is to take a good look at the person talking. Do his words fit the way he looks? Does what he says agree with the tone of voice? His posture? The look in his eyes? Stop and think. The minute you spend thinking about the real meaning of what people say to you may save another mistake.

62. This passage is mainly about ______.

A. how to interpret what people say

B. what to do when you listen to others talking

C. why we go wrong with people and how to avoid these mistakes

D. why we go wrong with people sometimes

63. According to the author, the reason why we go wrong about our friends is that       .

A. we fail to listen carefully when they talk  

B. we tend to doubt what our friends say

C. people tend to be annoyed when we check what they say

D. people usually state one thing but mean another.

64. The underlined word "it" in the second paragraph refers to______.

A. being friendly   B. a bit of envy    C. lucky dog               D. your luck

65. When we listen to a person talking, the most important thing for us to do is     __.

A. notice the way the person is talking

B. take a good look at the person talking

C. mind his tone, his posture and the look in his eyes

D. examine the real meaning of what he says based on his manner, his tone and his posture

66. The author is most probably a ______.

A. teacher     B. psychologist   C. philosopher    D. doctor

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一汽车被火车撞出20多米,发生严重事故,现场汽车内乘客伤情各异,有的大喊大叫,有的呻吟,有的不响不动。在现场下面一些情况中,哪项不对( )

A.大部分抢救人员奔向大喊大叫者
B.对伤口进行初步检查
C.有伤口出血应初步止血
D.伤口初步包扎
E.有内脏脱出的暂不还纳

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一个文件中有6个图层,若想将其中的三个图层合并为一层,应采用下列哪个命令()

A、链接图层(Link Layers)

B、成组图层(Group Layers)

C、拼合线稿(Flatten Artwork)

D、合并所选图层(Merge SelecteD.

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