什么叫观测系统?

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问题:

什么叫观测系统?

考点:地球科学地震勘探原理地震勘探原理题库
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龙卷风能轻易将地面的物体“卷”起来,它内部的压强远远______(填“大”或“小”)于外部的压强;小龙在墙上平面镜里的像以1.2m/s的速度向他靠近,小龙向平面镜移动的速度是______m/s.

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评述两税法实行的原因、内容及意义。

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关于子宫肉瘤下列哪项说法不恰当()

A.晚期肿瘤侵袭能力强,死亡率高

B.好发于围绝经期妇女,好发年龄50岁左右

C.子宫肉瘤非常少见,仅占子宫恶性肿瘤的1%~3%

D.不同组织学类型的肉瘤发病年龄相同

E.易于复发

题型:问答题 简答题

典型的品牌策划包括()。

A.产品线扩展

B.新品牌

C.多品牌

D.品牌扩展

题型:问答题 简答题



I am honored to be here today, (1) Harvard at this celebration of the College Board’s half century of working to promote (2) and equal opportunity in higher education.
Before I say anything else, I want to thank everyone in the room for the work you do every day to make college (3) , available, and (4) for millions of young people across the country.
I want to focus my remarks on a matter of (5) to American familiesand to the future of the nation -- restoring education to its proper role as a (6) to equal opportunity and (7) in our society.
This has been an (8) in higher education, with great and creative efforts made by many institutions. Earlier this year, we announced a new (9) at Harvard aimed at the students from families of low and (10) income. Under our new program, families with incomes of (11) will no longer be expected to contribute to the cost of attending Harvard for their children. Families with incomes of less than $ 60,000 will also see their (12) reduced.
We are proud of this effort at Harvard, but we are aware that the programs of individual institutions with means can never be a substitute for our shared (13) to provide adequate funding for Pell grants and other financial aid, and for the state and community college systems that make higher education (14) and affordable for the (15) .
There is something empty about (16) initiatives that may be right for one institution without attention to their broader impact. (17) , we (18) if we urge changes in national policy without doing what we can on our own campuses.
In this spirit, I want to (19) today a problem that is emerging with (20) in this nation.

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