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【单选题】
具有机构简单、权力集中、命令统一、决策迅速、指挥灵便、职责明确特点的行政体制形态是A.
直线制
B.
矩阵制
C.
职能制
D.
多维制
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举一反三
【单选题】变压器过励磁保护是按磁密度正比于（）原理实现的。
A.
电压U与频率f乘积；
B.
电压U与频率f的比值；
C.
电压U与绕组线圈匝数N的比值；
D.
电压U与绕组线圈匝数N的乘积。
【单选题】Bimbo Bimbo perhaps is the most popular local brand in bakery in Mexico. Every day, its products including sliced bread. cakes, and snacks are delivered nationwide by trucks. Executives at the Mexico ...
A.
Bimbo has had a spotty record with its prior U. S. investments, too.
B.
Bimbo had an estimated profit of $188 million in 2001 on sales of $3.8 billion.
C.
This means that Bimbo cannot accomplish its takeover.
D.
They're spending $50 million on a companywide information-management system from Oracle Corp.
E.
It also gives the company access to a market estimated at 120 million consumers, 20% of whom are Hispanic, allowing the company to expand the reach of its existing bread and tortilla manufacturing facilities in Texas and California.
F.
Because there aren't that many of them. (8)
【单选题】关于劳斯稳定性判据和奈奎斯特稳定性判据,以下叙述中正确的是( )。
A.
劳斯判据属于代数判据，是用来判断开环系统稳定性的。
B.
奈奎斯特判据是用来判断开环系统稳定性的。
C.
奈奎斯特判据是 根据系统的开环频率特性 来判断闭环系统稳定性的 。
D.
以上叙述均不正确。
【单选题】变压器过励磁保护是按磁密 B正比于_____原理实现的。
A.
电压 U与频率f的乘积
B.
电压 U与频率f的比值
C.
电压 U与绕组线圈匝数N的比值
D.
电压 U与绕组线圈匝数N的乘积
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