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Task 2Directions: This task is the same as Task t. The 5 questions or unfinished statements are numbered 41 through 45. In everyday usage "hot" means "having a lot of heat". Many people think that "cold" is something completely separated from heat. But this is not true. "Cold" simply means "having little heat". Your life depends on heat. In fact, every living thing depends on it. 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 before 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 the 19th century did they find the right answer. From the last two sentences of the passage, we can see ______.

A. men have never found the nature of heat
B. men found the nature of heat in the 17th century
C. men found the nature of heat in the 19th century
D. men found the nature of heat before the 19th century

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In less than 30 year’s time the Star Trek holodeck will be a reality. Direct links between the brain’s nervous system and a computer will also create full sensory virtual environments, allowing virtual vacations like those in the film Total Recall.61) There will be television chat shows hosted by robots, and cars with pollution monitors that will disable them when they offend. 62) Children will play with dolls equipped with personality chips, computers with in-built personalities will be regarded as workmates rather than tools, relaxation will be in front of smell-television, and digital age will have arrived.According to BT’s futurologist, Ian Pearson, these are among the developments scheduled for the first few decades of the new millennium(a period of 1,000 years), when supercomputers will dramatically accelerate progress in all areas of life.63) Pearson has pieced together to work of hundreds of researchers around the world to produce a unique millennium technology calendar that gives the latest dates when we can expect hundreds of key breakthroughs and discoveries to take place. Some of the biggest developments will be in medicine, including an extended life expectancy and dozens of artificial organs coming into use between now and 2040.Pearson also predicts a breakthrough in computer human links. "By linking directly to our nervous system, computers could pick up what we feel and, hopefully, simulate feeling too so that we can start to develop full sensory environments, rather like the holidays in Total Recall or the Star Trek holodeck," he says. 64) But that, Pearson points out, is only the start of man-machine integration:" It will be the beginning of the long process of integration that will ultimately lead to a fully electronic human before the end of the next century."Through his research, Pearson is able to put dates to most of the breakthroughs that can be predicted. However, there are still no forecasts for when faster-than-light travel will be available, or when human cloning will be perfected, or when time travel will be possible. But he does expect social problems as a result of technological advances. A boom in neighborhood surveillance cameras will, for example, cause problems in 2010, while the arrival of synthetic lifelike robots will mean people may not be able to distinguish between their human friends and the droids. 65)And home appliances will also become so smart that controlling and operating them will result in the breakout of a new psychological disorder—kitchen rage. Pearson has pieced together to work of hundreds of researchers around the world to produce a unique millennium technology calendar that gives the latest dates when we can expect hundreds of key breakthroughs and discoveries to take place.

一切不溶固体物质或浓酸、浓碱废液,严禁倒入水池,应直接倒入垃圾箱。( )

A. 对
B. 错

皮肤有外伤的人不得配制和使用剧毒试剂。( )

A. 对
B. 错

滴定管可倒置于滴定管架上保存,也可装满蒸馏水,在上口加盖指形管(使用中的滴定管,也可加盖指形管或纸筒以防尘埃)。( )

A. 对
B. 错

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