【正文】 to bee a new source of energy. to the fifth paragraph, under what conditions are algae able to use solar energy to make hydrogen? When there is no oxygen in the air. have met with difficulties when trying to make algae produce hydrogen efficiently. Which one of the following is one such difficulty？ It is too slow for algae to produce hydrogen when the sulfate is removed. is NOT true of algae? They are cheap to eat. 36. Listening Device Provides Landslide Early Warning does Such natural disasters in the first paragraph refer to? Landslides. of the following statements is true of landslides? All of the above. do researchers develop a new device to monitor signs of landsides? Because the mon methods .can cause false alarms. of the following statements is NOT true of the device, according to Paragraph 4? It is filled in with gravel. to the context, what does the word positives in the fifth paragraph mean? Evidences. 37.Don39。 understanding of methane? It was produced in oxygenfree environments. test whether plants are a source of methane, the scientists created An environment with the same concentration of oxygen as the Earth has. statement is true of the methane emissions of plants in the experiment! The higher the temperature, the greater the amount of methane emissions. of the following about methane is Not mentioned in the passage? Microbes in plants produce methane. is the beneficial point of some microbes consuming plantproduced methane? Less methane reaches the atmosphere. 22. Snowflakes does Professor Libbrecht believe to be true? No two snowflakes are exactly the same in shape. do the simplest snow crystals look like? They are sixsided. are the factors that affect the shape and growth rate of a snow crystal? Humidity and temperature. can be felt from the description in the 2nd paragraph that the author Admires the beauty of the snowflakes. is not able to Create snowflakes that are exactly alike. 23. Powering a City? It39。s fuel reserves? There will soon be an energy crisis, is NOT the result of consuming fossil fuels according to the last paragraph? The sea level will go up. Human Life 1. The writer believes that the population explosion results from a decrease in death rates 2. It can be inferred from the passage that in hunting and gathering cultures infants could be left dead in times of starvation. 3. According to the passage, which of the following statements about retired people in the United States is true? Many of them have a very hard life. 4. In Paragraph 3, the phrase “this need” refers to the need to take care of sick and weak people. 5. Which of the following best describes the writer?s attitude toward most of the nursing homes, and convalescent hospitals? Critical. 20． Explorer of the Extreme Deep is Alvin? A submersible. of the following statements is NOT a fact about Alvin? It can carry explorers as deep as 6,500 meters. 3.... a world that is still full of mysteries refers to The ocean. what aspects are the new HOV and :Alvin similar39。t want people to think the problem has been solved. does Stephen Schneider say about a heroin addict and methadone? Methadone is an effective way to treat a hard heroin addict. is Stephen Schneider39。s seat belt. is the function of the camera mentioned in Paragraph 4? It monitors the driver39。s invisibility cloak doesn39。1. Ford Abandons Electric Vehicles 1).What have the Ford motor pany, General Motor?s and Honda done concerning electric cars? They have given up producing electric cars. 2).According to Tim Holmes of Ford Europe, batterypowered cars Will not be the main transportation vehicles in the future. 3).Which auto manufacturers are still producing electric vehicles? Toyota and Nissan. 4).According to the eighth paragraph, hybrid cars run more miles than petrol driven cars. 5).Which of the following is true about the hope of car manufacturers according to the last paragraph? The legislation will allow more lowemission to produced. 3. Citizen Scientists turn to nonscientist citizens for help because they need them to collect data of the life cycle of living things. are citizen scientists asked to do? To send their research observations to a professional database. All that39。s needed to bee one ... (paragraph2), what does the word one stands for? a citizen scientist. is NOT true of Project BudBurst? Only experts can participate in it. is the final purpose of Project BudBurst? To investigate how plants and animals will respond as the climate changes. 4. Motoring Technology are researchers interested in doing as the road accidents worldwide increase to a shocking rate? They focus their research on safety and new fuels. to the second paragraph, most road accidents happen because drivers make mistakes. of the safety developments is NOT mentioned in the passage? Windscreens that can help drivers to improve their vision. is NOT the purpose of innovations that use satellite tracking and remote munications? To call for help when the car gets jammed in the traffic. is true of robotic drivers? It will take some time before robotic drivers can be put to practical use. 5. Latenight Drinking author mentions “pickmeup” to indicate that coffee is a stimulant. of the following tells us how caffeine affects sleep? Caffeine halves the body?s levels of sleep hormone. does paragraph 3 mainly discuss? Different effects of caffeinated coffee and decaf on sleep. does the