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  • 产后感染的新生儿败血症,最常见的感染途径是经产道错误正确儿科护理学(专)
  • 61[单选题] 国民收入分配作为一种分配关系,它的性质和形式是由社会生产方式决定的。首先取决于( )。 A.生产资料所有制的性质 B.生产资料公有制的性质 C.生产资料全民所有制的性质 D.生产资料集体所有制的性质政治经济学(财经类)
  • 英汉翻译(英语教育)
  • 10[阅读题] Unless we spend money to spot and prevent asteroids (小行星)now, one might crash into Earth and destroy life as we know it, say some scientists.        Asteroids are bigger versions of the meteoroids (流星)that race across the night sky. Most orbit the sun far from Earth and don‘t threaten us. But there are also thousands of asteroids whose orbits put them on a collision course with Earth.        Buy $50 million worth of new telescopes right now. Then spend $10 million a year for the next 25 years to locate most of the space rocks. By the time we spot a fatal one, the scientists say, we‘ll have a way to change its course.        Some scientists favor pushing asteroids off course with nuclear weapons. But the cost wouldn‘t be cheap.        Is it worth it?Two things experts consider when judging any risk re:1)How likely the event is;and 2)How bad the consequences if the event occurs. Experts think an asteroid big enough to destroy lots of life might strike Earth once every 500, 000 years. Sounds pretty rare—but if one did fall, it would be the end of the world. “If we don‘t take care of these big asteroids, they‘ll take care of us, ”says one scientist. “It‘s that simple. ”        The cure, though, might be worse than the disease. Do we really want fleets of nuclear weapons sitting around on Earth?“The world has less to fear from doomsday (毁灭性的)rocks than from a great nuclear fleet set against them, ”said a New York Times article. 1.       What does the passage say about asteroids and meteoroids?A) They are heavenly bodies different in composition.  B) They are heavenly bodies similar in nature.  【外语教育&网大学英语Ⅱ
  • 思维中断是指联想过程的中断,患者在说话时突然停顿 , 片刻后又重新说话,但所说内容不是原来的话题,是精神分裂症的特征性症状。精神科护理
  • 24. 在相同的弯距作用下,选用矩形梁比选用圆形梁的抗弯能力强   正确   错误中石油