一个足球先涨价10%,然后又降价10%,最后和原价一样.______.

题型:解答题

问题:

一个足球先涨价10%,然后又降价10%,最后和原价一样.______.

考点:分数的四则混合运算及应用
题型:解答题
由0到9这十个数字所组成的没有重复数字的五位数中,满足千位、百位、十位上的数字成递增等差数列的五位数共有(  )
A.720个B.684个C.648个D.744个
题型:解答题

出院护理的目的?

题型:解答题

用如图所示滑轮组提升重物.人用500N的拉力F,15s内使重为900N的物体匀速上升了3m.不计绳重和摩擦,求:

(1)拉力F做功的功率;

(2)滑轮组的机械效率;

(3)若改提400N的物体,求此时的机械效率.

题型:解答题

股票回购的方式包括( )。

A.间接回购

B.公开市场回购

C.直接回购

D.要约回购

题型:解答题



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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