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【单选题】
练习册P28,Ex4: 第2题
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举一反三
【单选题】电路如图 所示, T 1 管和 T 2 管的 β 均为 40 , r be 均为 3k Ω。试问:若输入直流信号 u I1 =20mv , u I2 =10mv ,则电路的共模输入电压 u IC = ?差模输入电压 u Id = ? ( )
A.
30mV,10mV
B.
15mV,10mV
C.
30mV,5mV
D.
15mV,5mV
查看完整题目与答案
【多选题】多天线技术中,主要的增益包括_
A.
集增益(divetiygain)
B.
列增益(arraygain)
C.
间复用增益(spatialmultiplexgain)
D.
码增益(codinggain))
查看完整题目与答案
【多选题】多天线技术中，主要的增益包括（）
A.
空间复用增益
B.
分集增益
C.
赋形增益
D.
编码增益
查看完整题目与答案
【单选题】电路如图所示,电位器 R P 为 10kΩ ,若输入电压 u i =10V ,当电位器的移动点移至 B 点时,则输出电压 u O 为 ( ) 。
A.
0
B.
30
C.
-15
D.
2.5
查看完整题目与答案
【简答题】The Internet is a way of life for US college students, with research showing them to be one of the most connected groups. A recent study by Harris Interactive and 360 Youth found that 93 percent of Am...
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【单选题】关于唾液的生理作用,下列哪项叙述是错误的
A.
湿润、溶解食物
B.
便于吞咽，并引起味觉
C.
清除口腔中的参与食物
D.
可使食物中的蛋白质初步分解
E.
有杀菌作用
查看完整题目与答案
【单选题】听力原文： Culture means the general way of life of a people. This simple definition implies that culture refers to the customs, traditions, social habits, values, beliefs, language, ways of thinking and d...
A.
Artistic and economic.
B.
Concrete and observable.
C.
Scientific and historical.
D.
Implicit and abstract.
查看完整题目与答案
【单选题】Section B Directions: There are 2 passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You shou...
A.
which encourages free trade at home and abroad
B.
where people’s chief concern is how to make money
C.
where all businesses are managed scientifically
D.
which normally works according to the federal budget
查看完整题目与答案
【简答题】In one way of thinking, failure is part of life. In way, failure may be a way towards success. The “Spider-story” is often .Robert Bruce , leader of the Scots in the 13 th century, was hiding in a cav...
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【多选题】近年来,我国企业“走出去”的步伐明显加快。我国企业“走出去”战略的重要意义是:
A.
增强我国企业的国际化经营能力
B.
培育我国具有世界水平的跨国公司
C.
充分利用国外资源
D.
拓展我国经济发展空间
查看完整题目与答案
相关题目：
【单选题】电路如图 所示, T 1 管和 T 2 管的 β 均为 40 , r be 均为 3k Ω。试问:若输入直流信号 u I1 =20mv , u I2 =10mv ,则电路的共模输入电压 u IC = ?差模输入电压 u Id = ? ( )
A.
30mV,10mV
B.
15mV,10mV
C.
30mV,5mV
D.
15mV,5mV
查看完整题目与答案
【多选题】多天线技术中,主要的增益包括_
A.
集增益(divetiygain)
B.
列增益(arraygain)
C.
间复用增益(spatialmultiplexgain)
D.
码增益(codinggain))
查看完整题目与答案
【多选题】多天线技术中，主要的增益包括（）
A.
空间复用增益
B.
分集增益
C.
赋形增益
D.
编码增益
查看完整题目与答案
【单选题】电路如图所示,电位器 R P 为 10kΩ ,若输入电压 u i =10V ,当电位器的移动点移至 B 点时,则输出电压 u O 为 ( ) 。
A.
0
B.
30
C.
-15
D.
2.5
查看完整题目与答案
【简答题】The Internet is a way of life for US college students, with research showing them to be one of the most connected groups. A recent study by Harris Interactive and 360 Youth found that 93 percent of Am...
查看完整题目与答案
【单选题】关于唾液的生理作用,下列哪项叙述是错误的
A.
湿润、溶解食物
B.
便于吞咽，并引起味觉
C.
清除口腔中的参与食物
D.
可使食物中的蛋白质初步分解
E.
有杀菌作用
查看完整题目与答案
【单选题】听力原文： Culture means the general way of life of a people. This simple definition implies that culture refers to the customs, traditions, social habits, values, beliefs, language, ways of thinking and d...
A.
Artistic and economic.
B.
Concrete and observable.
C.
Scientific and historical.
D.
Implicit and abstract.
查看完整题目与答案
【单选题】Section B Directions: There are 2 passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You shou...
A.
which encourages free trade at home and abroad
B.
where people’s chief concern is how to make money
C.
where all businesses are managed scientifically
D.
which normally works according to the federal budget
查看完整题目与答案
【简答题】In one way of thinking, failure is part of life. In way, failure may be a way towards success. The “Spider-story” is often .Robert Bruce , leader of the Scots in the 13 th century, was hiding in a cav...
查看完整题目与答案
【多选题】近年来,我国企业“走出去”的步伐明显加快。我国企业“走出去”战略的重要意义是:
A.
增强我国企业的国际化经营能力
B.
培育我国具有世界水平的跨国公司
C.
充分利用国外资源
D.
拓展我国经济发展空间
查看完整题目与答案
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