地震勘探爆破,理想的震源信号应满足哪些条件?衡量某种激发方式效果好坏的依据主要有哪三

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问题:

地震勘探爆破,理想的震源信号应满足哪些条件?衡量某种激发方式效果好坏的依据主要有哪三个方面?

考点:爆破工程师考试高级爆破工程师高级爆破工程师题库
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附子汤和真武汤中均有的药物是()。

A.附子

B.获苓

C.生姜

D.白术

E.芍药

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甲亢内科治疗停药首选实验室检查()。

A.TT4、FT4

B.TT3、TT3

C.TRAb

D.rT3

E.甲状腺摄131I

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(2008)图示电路中,磁性材料上绕有两个导电线圈,若上方线圈加的是100V的直流电压,则:()

A.下方线圈两端不会产生磁感应电动势

B.下方线圈两端产生方向为左"-"右"+"的磁感应电动势

C.下方线圈两端产生方向为左"+"右"-"的磁感应电动势

D.磁性材料内部的磁通取逆时针方向

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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.good

B.true

C.new

D.old

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各账户的追加比例之和必须为()。填写完成后发送保险公司申请核保。

A.60%

B.80%

C.100%

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