问题
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| 如图所示电路中，电源内阻不计，三个小灯泡完全相同且外电路变化时每个灯泡两端的电压都不会超过其额定电压，开始时只有S1闭合，当S2也闭合后，下列说法正确的是（ ） A．灯泡L1变亮 B．灯泡L2变亮 C．电容器C的带电荷量将增加 D．闭合S2的瞬间流过电流表的电流方向自右向左  |
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| 如图所示电路中，电源内阻不计，三个小灯泡完全相同且外电路变化时每个灯泡两端的电压都不会超过其额定电压，开始时只有S1闭合，当S2也闭合后，下列说法正确的是（ ） A．灯泡L1变亮 B．灯泡L2变亮 C．电容器C的带电荷量将增加 D．闭合S2的瞬间流过电流表的电流方向自右向左 |
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| 完形填空。 | ||||
| People live in different houses. You may know a wooden house or a paper house. But do you know a(n) 1 house? In 2008, the first ice house in North America opens its 2 to welcome some visitors. The floors, windows and walls are all made of ice. It has ten bedrooms 3 twenty people can stay there each night. Visitors to the house 4 in ice beds, sit on ice chairs and eat from ice plates. Well, the toilets are not made of ice, of course. It's usually below zero so it is very 5 inside the house. However, do the visitors just sit there to 6 warm? No, visitors have to 7 special clothes. These can make 8 feel warm until morning. Workers 9 about four weeks designing the ice house. Visitors can only stay in this ice house in winter. It isn't 10 in hot summer. Because this house is so special, it is becoming popular with young people. | ||||
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