用于抽吸腐蚀性流体的泵(莫氏硬度9以下的瓷制) ( )

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用于抽吸腐蚀性流体的泵(莫氏硬度9以下的瓷制) ( )

考点:海关报关员考试报关员综合报关员
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给你一个电压表,一个电阻箱,开关及导线,一节旧电池,请你测量干电池的电动势和内电阻.

画出实验电路图

实验过程中,将电阻箱拨到45Ω时,电压表的读数为0.9V,将电阻箱拨到如图(a)所示时电阻箱的阻值为______Ω.此时电压表的读数如图(b)所示,其值为______V.由以上数据,可求得该干电池的电动势ε=______V,内电阻r=______Ω.

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小儿手上发汗要穴为()

A.二马

B.二扇门

C.总筋

D.肾纹

E.小横纹

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导游服务集体三成员的合作共事实际上就是国内组团社、地方接待社和境外组团社之间的合作共事。

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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.profession

B.field

C.specialization

D.range

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T3M-M32控制系统的电梯,若轿顶打检修可上下运行,但在机房把应急电动运行开关打到检修后,再按上行或下行按钮,电梯无任何动作,请你列举出此种情况的可能原因(至少四种)。

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