The clock located inside our brains is similar to our bedside alarm clock because_____.
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1 .In the early 20th century, solar energy was used_____.
A in a war B to power water distillation plants in Chile. C to cook food D by Archimedes
2 .Which of the following statements about the coal is true?
A The coal is a kind of fossil fuels B The coal is an efficient fossil fuel. C As a raw material, coal is more important than oil in the chemical industries. D The coal will not be run out.
3 .Many researchers of the solar energy are being done in order to_____.
A take the place of the unsustainable fossil fuels B transmit more electromagnetic radiation C expand the construction industry D develop more irrigation projects
4 .Solar energy can be used_____.
A when it is purified B directly C after it is distilled D after it is converted to heat
5 .The solar energy system contains_____.
A collectors B shallow fiberglass tray C copper tubes D A, B and C
7 .In the third paragraph the author wants to tell the reader that_____.
A it is natural for teenagers to stay up late and get up late. B staying up late has a bad effect on teenagers' ability to think and learn. C during puberty most teenagers experience a kind of gray cloud. D it is hard for teenagers to get out of bed in the morning.
8 .Which of the following statements is NOT true according to the fourth and fifth paragraphs?
A Our biological clock resets itself automatically. B light gets through our eyes and resets our biological clock. C Our internal clock as well as the alarm clock can be reset automatically. D Our internal clock, like the alarm clock, can be reset.
9 .Which of the followings does not indicate the importance of windows as described in the first two paragraphs?
A Windows can change from clear to dark to save energy. B Windows help to save energy by letting light in. C Windows help to save energy by providing heat. D Windows enable people to have contact with the outside world.
10 .When are windows the weak link in a building?
A in the cold winter B in the hot summer C when air conditioners are turned on D both A and B
