1.单选题- (共2题)
A.该灯泡将被烧毁 | B.与灯泡串联的电流表读数为0.64A |
C.与灯泡并联的电压表读数为311V | D.通过灯泡的电流i=0.64sin314t |

A.A灯最暗 |
B.B灯最暗 |
C.D灯最暗 |
D.三只灯泡的亮度依然相同 |
2.选择题- (共3题)
阅读下列短文,从每题所给的A、B、C、D四个选项中,选出最佳选项。
A
Suppose you're in a rush, felling tired, not paying attention to your screen, and you send an email that could get you in trouble.
Realisation will probably set in seconds after you've clicked “send”. You freeze in horrors and burn with shame.
What to do? Here are four common email accidents, and how to recover.
Clicking “send” too soon
Don't waste your time trying to find out if the receivers has read it yet. Write another email as swiftly as you can and send it with a brief explaining that this is the correct version and the previous version should be ignored.
Writing the wrong name
The sooner you notice, the better. Respond quickly and briefly, apologizing for your mistake. Keep the tone measured: don't handle it too lightly, as people can be offered, especially if your error suggests a misunderstanding of their culture(i.e. incorrect ordering of Chinese names).
Clicking “reply all” unintentionally
You accidentally reveal(透露)to entire company what menu choices you would prefer at the staff Christmas dinner, or what holiday you'd like to take. In this instance, the best solution is to send a quick, light-hearted apology to explain your awkwardness. But it can quickly rise to something worse, when everyone starts hitting “reply all” to join in a long and unpleasant conversation. In this instance, step away from your keyboard to allow everyone to calm down.
Sending an offensive message to its subject
The most awkward email mistake is usually committed in anger. You write an unkind message about someone, intending to send it to a friend, but accidentally send it to the person you're discussing. In that case, ask to speak in person as soon as possible and say sorry. Explain your frustrations calmly and sensibly—see it as an opportunity to clear up any difficulties you may have with this person.
3.多选题- (共3题)
A.有效值就是交流在一个周期内的平均值 |
B.交流的有效值是根据电流的热效应来定义的 |
C.在交流电路中,交流电流表和交流电压表的示数表示的都是有效值 |
D.对于正弦交变电流,最大值的平方等于有效值平方的2倍 |
A.输电线上损失的电压跟输电电压成正比 |
B.输电线上损失的功率跟输电电压成反比 |
C.输电线上损失的功率跟输电电压的平方成反比 |
D.输电线上损失的功率跟输电线上电压损失的平方成正比 |

A.a为电流表,b为电压表 |
B.a为电压表,b为电流表 |
C.线路输送电功率是2200 W |
D.线路输送电功率是2.2×106 W |
4.解答题- (共2题)



(1)要棒以

(2)当棒运动到某位置时,外力突然消失,棒将如何运动?
(3)棒匀速运动时的速度多大?
(4)达最大速度时,电路的电功率多大?重力的功率多大?
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【1】题量占比
单选题:(2道)
选择题:(3道)
多选题:(3道)
解答题:(2道)
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【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:0
5星难题:0
6星难题:7
7星难题:0
8星难题:0
9星难题:0