横向弛豫时间(T2)

题型:名词解释

问题:

横向弛豫时间(T2)

考点:医学影像技术(医学高级)MRIMRI题库
题型:名词解释

气候对城市的影响中,下列叙述正确的是(    )

A.过干或过湿,一般不利于城市的发展

B.由于城市人口密集,数量大,需水多,所以城市最好建在雨水充沛的热带雨林区

C.世界的城市主要分布于气温适中的中高纬地区

D.在我国的西北部干旱、半干旱地区,由于气候条件非常恶劣,所以没有大城市的分布

题型:名词解释

In one sense, we can trace all the problems of the American city back (91) a single starting point: we Americans don’t like our cities very much.
That is, on the (92) of it, absurd. After all, more than three-fourths of us now live in cities, and more are (93) to them every year. We are told that the problems of our cities are (94) more attention in Washington, and scholarship has discovered a whole new (95) in urban studies.
(96) , it is historically true: in the American psychology, the city has been a basically suspect institution, (97) with the corruption of Europe, totally lacking that sense of spaciousness and innocence of the (98) and the rural landscape.
I don’t pretend to be a scholar on the history of the city in American life. But my thirteen years in public (99) , first as an officer of the U. S. Department of Justice, then as Congressman, and now as Mayor of the biggest city in America have taught me (100) too well the fact that a p antiurban attitude (101) consistently through the mainstream of American thinking. Much of the (102) behind the settlement of America was in reaction (103) the conditions in European industrial centers and much of the theory (104) the basis of freedom in America was linked directly to the availability of land and the perfectibility of man outside the corrupt influences of the city.
What has this to do with the predicament of the modern city I think it has (105) to do with it. For the fact is that the United States (106) the federal government, which has historically established our national priorities, has simply never thought that the American city was "worthy" of (107) —at least not to the (108) of expending any basic resources on it.
Antipathy to the city predates the American experience. When industrialization (109) the European working man into the major cities of the continent, books and pamphlets appeared (110) the city as a source of crime, corruption, filth, disease, vice, licentiousness, subversion, and high prices.

A.Nonetheless

B.But

C.Furthermore

D.Although

题型:名词解释

串联电路块并联连接时,分支的结束用()指令

A、AND/ADI

B、OR/ORI

C、ORB

D、ANB

题型:名词解释

下列关于我国封闭式基金交易规则的说法,正确的有( )。

A.封闭式基金的交易时间为每周一至周五,每天9:30~11:30、13:00~15:00,法定公众节假日除外

B.封闭式基金的交易遵从“价格优先、时间优先”的原则

C.买入与卖出封闭式基金份额,申报数量应当为100份或其整数倍

D.沪、深证券交易所对封闭式基金的交易不实行价格涨跌幅限制

题型:名词解释

水泥国家标准规定,凡()、()、初凝时间、安定性中的()不符合标准规定时,均为废品。

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