【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 = ? ( )
【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 ( ) 。
【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...
【简答题】In one way of thinking, failure is part of life. In 26 way, failure may be a way towards success. The “Spider-story” is often 27 Robert Bruce, leader of the Scots in the 13 th century, was hiding in a...
【单选题】关于唾液的生理作用,下列哪项叙述是错误的
【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
【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...
【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: