What is the beneficial point of some microbes consuming plant-produced methane?
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1 .What is the author's attitude toward the future of autos?
A Enthusiastic B Pessimistic C optimistic D Cautious
2 .What was scientists' understanding of methane?
A It was produced from plants. B It was not a greenhouse gas. C It was produced in oxygen-free environments. D It traps more heat than any other greenhouse gas.
3 .To test whether plants are a source of methane, the scientists created_____.
A a oxygen-free environment B an environment with the same concentration of oxygen as the Earth has C a carbon dioxide-free environment D an environment filled with the greenhouse gas
4 .Which statement is true of the methane emissions of plants in the experiment?
A The lower the temperature, the higher the amount of methane emissions. B Living plants release less methane than dried plants at the same temperature. C When exposed to sunlight, plants stop releasing methane. D The higher the temperature, the greater the amount of methane emissions.
5 .Which of the following about methane is not mentioned in the passage?
A Plants growing in soil release methane. B Plants growing in water release methane. C Soil microbes consume methane. D Microbes in plants produce methane.
7 .The main idea of this passage is_____.
A Traffic accidents are mainly caused by motorists. B Thousands of people the world over are killed each year. C The laws of some countries about driving are too lax. D Only stricter traffic laws can prevent accidents.
8 .What does the author think of society toward motorists?
A Society smiles on the motorists B Huge car parks are built in the cities and towns C Victims of accidents are nothing D Society condones their rude driving
9 .Why does the author say "his car becomes the extension of his personality?"
A Driving can show his real self B Driving can show the other part of his personality C Driving can bring out his character. D His car embodies his temper.
10 .Which of the followings is not mentioned as a way against traffic accidents?
A Build more highways B Stricter driving tests C Test drivers every three years D Raise age limit and lay down safety specifications
