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【单选题】
在测量二极管反向电阻时,若用两手把捏紧,电阻值将会( )A.
变大
B.
变小
C.
无变化
D.
不确定
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【单选题】用同一盐酸溶液分别滴定体积相等的NaOH溶液和NH 3 ·H 2 O溶液，结果消耗了相同体积的盐酸溶液。说明两溶液(NaOH和NH 3 ·H 2 O)中的( )。
A.
c(OH - )相等
B.
NaOH和NH 3 ·H 2 O的浓度(以mol·dm -3 为单位)相等
C.
两物质的K b 相等
D.
两物质在溶液中电离度相等
E.
两溶液滴定的pH值突跃范围相等
【单选题】用同一盐酸溶液分别滴定体积相等的 NaOH 溶液和 NH 3 ·H 2 0 溶液,消耗盐酸溶液体积相等。说明两溶液中的 ( )
A.
[OH - ] 相等
B.
NaOH 和 NH 3 ·H 2 0 的浓度相等
C.
两物质的 p K b 相等
D.
两物质的电离度相等
【简答题】Many students as well as their parents wrote to Bill Gates to seek____________________________ about what students should learn and whether it is OK to ______________________high school or____________...
【单选题】More Americans feel the U.S. is not that important as a world leader now probably because ______.
A.
the U.S. topples less governments now than they did in the past
B.
less Americans believe their country should be the leading superpower
C.
using the threat of force in realty is not as simple as written in the textbook
D.
the government decides to cut the expense on national security
【单选题】Which of the following is seen as a benefit of the euro? 下列哪项被视为欧元的优势?
A.
Governments gaining greater control over their monetary policies政府对其货币政策获得更大的控制权
B.
Reduced competition in most industries减少了大多数行业的竞争
C.
Zero interest expense for businesses企业零利息支出
D.
Lower foreign exchange and hedging costs 降低外汇和对冲成本
【简答题】《党政机关公文处理工作条例》的实施日期是（ ）年7月1日。
【单选题】用同一盐酸溶液分别滴定体积相等的NaOH溶液和 溶液,消耗盐酸溶液的体积相等。说明两溶液中的( )。
A.
相等
B.
NaOH和 的浓度(单位: )相等
C.
两物质的pK b 相等
D.
两物质的电离度相等
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