基元速度三角形、气流攻角、影响攻角的因素及物理意义。

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问题:

基元速度三角形、气流攻角、影响攻角的因素及物理意义。

考点:民用航空器维修执照考试M14燃气涡轮发动机M14燃气涡轮发动机题库
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一急性心梗患者,突然晕厥,心电图为室速160次/分,查血压为80/60mmHg,脉搏触不清,心音弱,无杂音。

如上述药物治疗无效应进一步选择: ()

A.莫雷西嗪

B.心得胺

C.阿托品

D.胺碘酮

E.英卡胺

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试校验某企业110kV变电所接地线的热稳定。已知条件如下:①流过接地线的稳态短路电流,Ig=3kA;②变电所配有一套主保护,第一级后备保护的动作时间tR=1.1s;③断路器开断时间t0=0.11s;④接地线为扁钢。

接地极的截面不宜小于()。

A.24mm2

B.36mm2

C.48mm2

D.72mm2

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There are many kinds of friends. Some are always (1) you, but don’t understand you. Some say only a few words to you, but understand you. Many people will step in your life, but only (2) friends leave footprints.
I shall always recall the autumn and the girl with the (3) . She will always bring back the friendship between us. I know she will always be my best friend.
It was the golden season. I could see the yellow leaves (4) with the cool (5) . In such a season, I liked walking alone on the roads covered with leaves, (6) to the sound of them.
Autumn is a (7) season and life is uninteresting. The free days always get me (8) . But one day, the sound of a violin (9) into my ears like a stream flowing in the mountains. I was so surprised that I jumped to see what it was. A young girl, standing in the wind, was (10) in playing her violin.
I had (11) seen her before. The music was so nice that I listened quietly. Lost in the music, I didn’t know that I had been (12) there for so long but my existence did not seem to disturb her.
Leaves were still falling. Every day she played the violin at the comer of the building (13) I went downstairs to watch her performance. I was the only listener. The autumn seemed no longer lonely and life became (14) . (15) we didn’t know each other, I thought we were already good friends. I believe she also loved me.
Autumn was nearly over. One day, when I was listening carefully, the sound suddenly (16) . To my astonishment, the girl came over to me.
"You must like music from the violin." she said.
"Yes. And you play very well. Why did you stop’." I asked.
Suddenly, a (17) expression appeared on her face and I could feel something unusual.
"I came here to see my grandmother, but now I must leave. I once played very badly. It was your listening every day that (18) me. " she said.
"In fact, it was your playing (19) gave me a meaningful autumn," I answered, " Let’s be friends. "
The girl smiled, and so did I. I never heard her play again in my life. I no longer went downstairs to listen to her. Only thick leaves were left behind. But I will always remember the fine figure of the girl. She is like a (20) —so short, so bright, like a shooting star giving off so much light that makes the autumn beautiful.

Ⅱ. 完形填空/Close

A.surprised

B.excited

C.encouraged

D.interested

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点检是指对设备的运行状态进行哪些确认?

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什么是汽轮机机的设计工况?

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