题目内容
（请给出正确答案）
A．Polluted water.
B．Crowded buses.
C．Traffic jams.
D．Rainy weather.
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更多“According to the passage, which of the following factors might spoil the tourists' fun at”相关的问题
A．The developing world is unwilling to take preventive action.
B．People think the developed world should take more responsibility.
C．People do not consider the preventive action an urgent task.
D．Harmful emissions are hard to reduce in the developing countries.
A、1 and 3 only
B、1, 2 and 3 only
C、2 and 4 only
D、2, 3 and 4 only
A、Finding her car stolen, a policeman was asked to help.
B、Finding her car stolen, she hurried to a policeman for help.
C、In order to attract visitors, historic buildings should be maintained.
D、In order to attract visitors, city councils should maintain historic buildings.
A、protein, carbohydrate, lipid
B、alcohol, protein, vitamin
C、dietary fiber, protein, lipid
D、vitamin, alcohol, lipid
A、Large banks participate in the money markets by selling large negotiable CDs.
B、The U.S. government and corporations borrow in the money markets because cash inflows and outflows are rarely synchronized.
C、The Federal Reserve is the single most influential participant in the U.S. money market.
D、All of the above are true.
E、Only (a) and (b) of the above are true.
A．Had
B．asleep
C．deceived
D．when
There are four levels of sleep, each being a little deeper than the one before. As you sleep, your muscles relax little by little. Your heart beats more slowly, and your brain slows down. After you reach the fourth level, your body shifts back and forth from one level of sleep to the other.
Although your mind slows down, from time to time you will dream. (10) Scientists who study sleep state that when dreaming occurs, your eyeballs begin to move more quickly (although your eyelids are closed). This stage of sleep is called REM, which stands for rapid eye movement.
If you have trouble failing asleep, some people recommend breathing very slowly and very deeply. Other people believed that drinking warm milk will help make you drowsy. There is also an old suggestion that counting sheep put you to sleep!
A good title for this passage is______.
A．Sleep
B．Good Health
C．Dreams
D．Work and Rest
Your life depends on heat. In fact, every living thing depends on it. (28) Without heat, every living thing would be frozen to death. All living things get their heat from the sun, which provides the conditions in which life is possible.
Since the dawn of history, man has been able to make his own heat. He has been able to release the sun's heat that is trapped in things such as wood, coal and oil. And he has been able to use this heat.
Heat has made civilization possible. With heat, man could melt metals. As man learned to use metals and fuels, industries grew. As a result, engines were invented. These are machines that change heat energy into mechanical energy. Engine can do the work of many men. Without engines industrial civilization is impossible.
Yet when the first engines were built in the 17th century, men were still wondering about the nature of heat. "What is it？" they asked. Not until the early years of 19th century did they find the right answer.
In everyday usage, "hot" means______.
A．the weather is fine and it is in summer
B．one has a temperature
C．having a great deal of heat
D．having very little heat
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