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【简答题】
如 图所示,图甲为一个电灯两端电压与通过它的电流的变化关系曲线.由图可知,两者不成线性关系,这是 由于电流的热效应造成了电阻变化.若把三个这样的电灯串联后,接到电压恒定为 12 V 的电路中,参考这条曲线则此时每个灯泡的电阻是 _________Ω ;又如图乙所示,将一个这样的电灯与 20 Ω 的定值电阻 R0 串联,接在电压恒为 8 V 的电路中,不计电流表内阻,则那该灯的实际功率是 ______W 。
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【简答题】耐火极限是指对任一建筑构件按时间-温度标准曲线进行耐火试验,从受到火的作用时间起,到失去 或 或 时止的这时间。
【简答题】PART 2 Describe a recent news story that you have heard or read about. You should say: what the news was and where you heard or read it; if it was significant for many people; how it has changed, or w...
【单选题】How to Read Books A number of recent books have reworked subjects, forms and writing techniques. Today's children read stories about divorce, death, drugs, air pollution, political extremism and viole...
A.
reworded
B.
rewritten
C.
processed
D.
revised
【单选题】What are the findings of recent survey?
A.
The reasons why-people don't read newspapers are more complicated than assumed.
B.
There are more uneducated people among the wealthy than originally expected.
C.
The number of newspaper readers is steadily increasing.
D.
There are more nonreaders among young people nowadays.
【简答题】怎样理解新民主主义革命与社会主义改造都是为了解放和发展生产力?
【单选题】Questions 11 to 15 are based onthe following passage: According to a recent surv, ey, employees in many companies today work longer hours than employees did in 1979. They also take shorter vacations t...
A.
Many people work long hours but do not always do a lot of work.
B.
Most people can get more work done by working longer hours.
C.
Most Americans work 80 hours a week, and some work even longer.
D.
People can make more money by working longer hours.
【简答题】Translate the sentences below into Chinese. There's a recent trend for older people to read their newspapers online.
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