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【单选题】
以下几个选项中描述错误的是（）A.
电磁吸力与气隙大小成正比
B.
改变电磁铁芯的形状，即可改变吸力特性
C.
若直流电磁铁的吸力特性较平坦，可减少闭合时机械冲击
D.
若直流电磁铁的吸力特性较陡峭，确保可靠吸合衔铁
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皮皮学刷刷变学霸
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【简答题】举例说明单体、单体单元、结构单元、重复单元、链节等名词的含义,以及它们之间的相互关系和区别。
【简答题】举例说明单体、单体单元、结构单元、重复单元、链节等名词的含义,以及它们之间的相互关系和区别。
【单选题】Our clients asked us to bring down our prices because they consider them _.
A.
on the high side
B.
out of line with
C.
are running high
D.
be too high
【简答题】举例说明单体、单体单元、结构单元、重复单元、链节等名词的含义,以及它们之间的相互关系和区别。
【单选题】已知ArrayList继承了List接口，现预构造ArrayList类的一个实例，下列哪个方法是正确的（ ）
A.
ArrayLIst myList = new Object ();
B.
List myList = new ArrayList ();
C.
ArrayList myList = new List ();
D.
List myList = new List ();
【单选题】Any lender about to make a loan wishes to know the real rate of interest; i. e. , the contractual rate of interest less the rate of inflation. But what rate of inflation to use, past or expected? Past...
A.
Since the contractual interest is future income to a prospective lender, it is more appropriate to adjust that income in terms of inflation expected for the future.
B.
Since estimating the rate of expected inflation presupposes careful economic analysis, lenders might derive coincidental benefits from doing such an estimate.
C.
The rate of expected inflation will differ little from the rate of past inflation when inflation is steady.
D.
No official rate of past inflation is computed for any period shorter than a month.
E.
The official rate of past inflation is a figure that depends on what commodities, in what proportions, determine the official price index.
【简答题】举例说明单体、单体单元、结构单元、重复单元、链节等名词的含义，以及它们之间的相互关系和区别。
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