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【判断题】
Most diodes are similar in appearance to a resistor and will have a painted line on one end showing the direction or flow (white side is negative). If the negative side is on the negative end of the circuit, current will flow. If the negative is on the positive side of the circuit, no current will flow. As the circuit diagram in following picture, the light is turned on.A.
正确
B.
错误
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【简答题】Reporter: How long have you been a firefighter? Wilson: For eight years. Reporter: How did you get started? Wilson: First, I had to take a lot of tests in two weeks. Then, I went to the firefighter ...
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