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You bought a sire card from a company the day before yesterday, but when you went home and you found that it didn’t work. So you write to the director of the company and express your complaint. Marks will be awarded for content, organization, grammar and appropriateness.
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Design of all the new tools and implements is based on careful experiments with electronic instruments. First, a human "guinea pig" is tested using a (31) tool. Measurements are taken (32) the amount of work done, and the buildup of heat in the body. (33) joints and stretched muscles cannot (34) as well, it has been found, (35) joints and muscles in their (36) positions. The same person is then tested again, using a tool designed according to the suggestions made by Dr. Tichauer. All these tests have shown the great (37) of the new designs over the old.One of the electronic instruments used by Dr. Tichauer, the myograph (肌动描记器), (38) visible through electrical signals the work done by human muscle. Another machine (39) any dangerous features of tools, thus proving information upon (40) to base a new design. One (41) of tests made with this machine is that a tripod stepladder is more (42) and safer to use than one with four legs.This work has (43) the attention of efficiency experts and time-and-motion-study engineer, but its value goes far (44) that. Dr. Tichauer’s first (45) is for the health of the tool user. With the (46) use of the same tool all day long on (47) lines and in other jobs, even light (48) work can put a heavy stress on one small area of the body. In time, such stress can cause a disabling disease. (49) , muscle fatigue is a serious safety (50) . （45）（）
Design of all the new tools and implements is based on careful experiments with electronic instruments. First, a human "guinea pig" is tested using a (31) tool. Measurements are taken (32) the amount of work done, and the buildup of heat in the body. (33) joints and stretched muscles cannot (34) as well, it has been found, (35) joints and muscles in their (36) positions. The same person is then tested again, using a tool designed according to the suggestions made by Dr. Tichauer. All these tests have shown the great (37) of the new designs over the old.One of the electronic instruments used by Dr. Tichauer, the myograph (肌动描记器), (38) visible through electrical signals the work done by human muscle. Another machine (39) any dangerous features of tools, thus proving information upon (40) to base a new design. One (41) of tests made with this machine is that a tripod stepladder is more (42) and safer to use than one with four legs.This work has (43) the attention of efficiency experts and time-and-motion-study engineer, but its value goes far (44) that. Dr. Tichauer’s first (45) is for the health of the tool user. With the (46) use of the same tool all day long on (47) lines and in other jobs, even light (48) work can put a heavy stress on one small area of the body. In time, such stress can cause a disabling disease. (49) , muscle fatigue is a serious safety (50) . （39）（）
I heard a knock at the door. I peered through the peephole, and there was my father. As I opened the door, Dad began talking although he seemed strangely out of breath, "The power is out all along the northern east coast. People are saying that something went wrong at Niagara Falls. A power line must have failed."I was astounded. Power lineI was getting on the elevator, and the door wouldn’t close. I got irritated with it and finally climbed down to the lobby—all nine stories—to find out what the matter was. That was just like Dad to get angry at something that didn’t work.All of a sudden, we heard people shouting from outside. Dad opened up the window. "Wow, look out there!" Intrigued, I opened another window and looked out. The street was packed with cars whose drivers didn’t know when or where to go. Policemen filled the streets trying to mollify the pandemonium. Right across the road, workers, who had been trapped on the eleventh floor while building, attempted to cling to railing and climb down to safety. Peoples’ interrogating and raucous shouts filled the hot August air.I realized my father was speaking, "We can’t stay up here. With no power, there will be no emergency services. If the building caught on fire, we’d be trapped. Let’s go and I’I1 try to call Morn." He grabbed some cash and the cell phone. I followed him in the fatiguing trip down the stairs to the lobby. Why couldn’t we have gotten a room on the first floorI took a small couch and sat down. The stifling hotel lobby was full of people. Some were hoping to get a room; others had returned to the hotel because their flights had been canceled. Many attempted to contact family or friends on cell phones. I relaxed on the couch, noticing the only light in the room was from the few sunrays that managed to enter through the windows. Restless, Dad left to wander around Times Square. He could never sit around without being occupied.After what seemed like hours, Dad finally returned. 1 let him sit on the couch while I tried to cool down on the marble floor. The sun had set, and the room was dark, illuminated only by two small candles that tossed shadows upon the wall.I lay down on the floor and tried to nap. The surface was very hard, but it was nice and cool. I drifted off to sleep only to awaken immediately. At first this had been an exciting adventure, but now I just wished the electricity would come back on so we would be able to go back to our room. I lay there with my eyes closed, unable to sleep, listening to people nearby as they talked. I must have finally fallen asleep though, for I woke up and asked Dad what time it was."Eight. The lights are on two blocks down from us. The power should come back on pretty soon." He paused, a look of reverie on his thee, "You know, last night I was able to see the stars over Times Square. I wonder how long it’s been since somebody was able to see that.\ The author’s father went to Time Square because （）
The discovery of planets around distant stars has become like space-shuttle launches—newsworthy but just barely. With some 50 extrasolar planets under their belt, astronomers have to announce something really strange to get anyone’s attention.Last week they did just that. Standing in front of colleagues and reporters at the American Astronomical Society’s semiannual meeting in San Diego, the world’s premier planet-hunting team—astronomer Geoffrey Marcy of the University of California, Berkeley, and his colleagues—presented not one but two remarkable finds. The first is a pair of planets, each about the mass of Jupiter, that whirl around their home star 15 light years from Earth in perfect lockstep. One takes 30 days to complete an orbit, the other exactly twice as long. Nobody has ever seen such a configuration. But the second discovery is far stranger—a solar system 123 light years away in the constellation Serpens, that harbors one "ordinary" planet and another so huge—17 times as massive as Jupiter— that nobody can quite figure out what it can be. "It is," says Marcy, "a bit frightening."What’s frightening is that these discoveries make it clear how little astronomers know about planets, and they add to the dawning realization that our solar system—and by implication Planet Earth—may be a cosmic oddball. For years theorists figured that other stars would have planets more or less like the ones going around the sun. But starting with the 1995 discovery of the first extrasolar planet—a gassy monster like Jupiter but orbiting seven times as close to its star as Mercury orbits around our sun—each new find has seemed stranger than the last. Searchers have found more "hot Jupiters" like that first discovery. These include huge planets that career around their stars not in circular orbits but in elongated ones; their gravity would send any Earthlike neighbors flying off into space. Says Princeton astronomer Scott Tremaine: "Not a single prediction for what we’d find in other systems has turned out to be correct."Last week’s giant was the most unexpected discovery yet. Conventional theory suggests that it must have formed like a star, from a collapsing cloud of interstellar gas. Its smaller companion, only seven times Jupiter’s mass, is almost certainly a planet, formed by the buildup of gas and dust left over from a star’s formation. Yet the fact that these two orbs are so close together suggests to some theorists that they must have formed together—so maybe the bigger one is a planet after all.Or maybe astronomers will have to rethink their definition of "planet." Just because we put heavenly objects into categories doesn’t mean the distinctions are necessarily valid. And as Tremaine puts it, "When your classification schemes start breaking down, you know you’re learning something exciting. This is wonderful stuff.\ Why are the two finds by Geoffrey Marcy and his colleagues remarkable（）
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