请在如图中标出当二极管中有正向电流通过时螺线管的N极.
二极管具有单向导电性,当二极管中有正向电流时,应由图中右侧流出;
则由右手螺旋定则可得,螺线管右侧为N极.
故答案如图:
阅读理解。
Travel Information
1. It is said that the love story about Xu Xian and the White Snake happened on _____.
A. Dragon Tower
B. West Lake
C. Water Cube
2. If a person in Hangzhou feels like visiting Water Cube, he should call _____to get
information.
A. 0451-82187899
B. 0571-68345576
C. 0lO一28135589
3. Disneyland, which attracts a lot of tourists from home and abroad every year, is in
_____ according to the travel information.
A. Beijing
B. Harbin
C. Hong Kong
4. Two travelers plan to have a bird's-eye view (俯视) of Harbin, and they need to pay
_____ from the information above.
A. ¥150
B. ¥300
C. ¥450
5. Which of the following is TRUE according to the Ravel information?
A. Water Cube is special in design.
B. The price of a ticket for West Lake is the highest.
C. In Disneyland.you can't see any cartoon characters.
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