1岁小儿,7个月时会翻身和独坐,现坐不稳,脸色渐苍白,外周血象见红细胞体积大,中性粒细胞呈分叶过多现象,此小儿最可能的诊断是
A. 呆小病
B. 大脑发育不全
C. 缺血缺氧性脑病后遗症
D. 营养性巨幼细胞性贫血
E. 维生素D缺乏性佝偻病
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只要是由过去的交易、事项形成的并由企业拥有或控制的资源,均应确认为企业的一项资产。( )
A. 对
B. 错
当数据的物理存储结构改变了,应用程序不变,而由DBMS处理这种改变,这是指数据的逻辑独立性。( )
A. 对
B. 错
To our great surprise, his casual remark___________________ (竟然引起了一场政治风暴).
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 are: 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. We can conclude from the passage that_________.
A. while pushing asteroids off course nuclear weapons would destroy the world
B. asteroids racing across the night sky are likely to hit Earth in the near future
C. the worry about asteroids can be left to future generations since it is unlikely to happen in our lifetime
D. workable solutions still have to be found to prevent a collision of asteroids with Earth