【简答题】在霍尔效应中,导体长4.0cm,宽1.0cm,厚1.0×10 -3 cm,沿长度方向载有3A的电流,当磁感应强度为1.5T的磁场垂直地通过该导体时,产生1.0×10 -5 V的横向霍尔电压V(在宽度两端),如图所示。
【简答题】Questions 24to 27are based on the following passage. I have heard of the story of the world famous opera singer Tina Kiberg. As a child, Tina was a violinist and spent her free time practicing and p...
【单选题】Which of the following people are posing greater uncertainties for the State?
【单选题】Which of the following would the author most probably agree?
A.
Not all of the developing world's most successful companies are globalizing.
B.
Companies venturing abroad most eagerly are the most successful at home.
C.
Local dynamos are the most successful firms all over the world.
D.
Globalizing is not good for companies in emerging economies.
【单选题】Which of the following statements would the author be likely to agree?
A.
The heavier the wood is, the better the boat is.
B.
The stronger players are more likely to be chosen in the dragon boat race.
C.
Good oarsmen can drive the boat in perfect direction.
D.
The final result of the race is dependant on three conditions.