题干

“是药三分毒”.安全用药是指( )

A:选择价格高的药物

B:减少药物的服用种类

C:减少药物的服用剂量

D:据病情需要选择恰当药物品种、剂量和服用时间

上一题 下一题 0.0难度 选择题 更新时间:2011-12-21 07:07:46

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D

同类题3

阅读下面的文字,完成下列小题。

    一位新锐设计师受梵高名画《星空》的启发,设计出一条“夜光自行车道”,路面上镶嵌着成千上万颗发着蓝绿色微光的小石头,如同银河洒落人间,令人叫绝。设计师认为,技术不应是坚硬麻木的存在,而应“以一种更具交互性和诗意的方式强化我们的感受能力”。

    的确,技术并不只具有实用价值,亦可以是审美价值的摇篮。中国的陶瓷闻名遐迩,丝绸远销世界,古代建筑令人陶醉,皆因实用价值与审美价值相得益彰。技术满足人的物质需要,艺术满足人的精神需要,技术与诗意融合,更能熏染出高品质的生活。当我们向科技的诗意一面投去更多关注,就不难发现,技术也可以充满温度和情怀,饱含灵性和魅力。

    国内外一些城市,涌现出一种叫做“垂直森林”的新式建筑,层层种下乔木、灌木和草本植物,让绿植充满建筑空间。传统观念里,城市的钢筋水泥风格同绿色自然格格不入,“垂直森林”的建筑设计却成功地让人与自然超越空间局限融合在一起,为“诗意的栖居”创造了无限可能。在南方医科大学人体标本陈列馆,我国现代临床解剖学奠基人钟世镇院士创新标本制作方法,让各类人体铸型标本如珊瑚、水晶般精美,令参观者心情放松,不仅摆脱了对“解剖”的莫名恐惧,更对探索人体奥秘充满了兴趣。

    科学同样要有美感,技术创新也能很诗意。如果把科技比作繁茂的大树,效率和性能是其树干,人文要素则近乎于树枝和树叶。没有树干,枝叶无所依存;剥掉树皮,去除叶子,树干不过是根木头。科技不能只有理性思维而缺少“诗性思维”,否则就难免枯燥无趣。以城市规划来说,许多城市的新城区道路宽度、公共广场都唯宽大是从,不仅不讲科学,实际上也诗意无存,既浪费也没有特色。

   “技术的诗意”,其实不是铺陈、夸张、搞怪,而是“得天之道,其事若自然”。如同庖丁解牛,始终按照其结构特征用刀,在顺应自然求至善中尽显智慧和技艺。其中凝聚着“真”——尊重规律、以道驭术;凝聚着“善”——简约利物、惠而不费;凝聚着“美”——巧夺天工、出神入化。多些“技术的诗意”,实质正是遵守技术伦理,把创意和人文有机融合,用“人的尺度”统摄技术,给人更多便利感受和美的体验。

    为什么有些技术成果缺乏良好用户体验?不是技术创新能力达不到,而是在贪多求快的浮躁心理驱使下主动放弃了对诗意的探求。这提醒我们,无论是规划设计还是科学研究都极具专业性,决策者有必要多咨询专业人士意见,防止“政绩冲动”和“商业驱使”误导决策。一切技术创新的目的都在于提升生活品质,理应多从人文领域寻求灵感启发和精神支柱,在实用和审美并重中释放智慧和技艺。

    美是愉悦源泉,美也是巨大竞争力。科技之美,立足于“人的尺度”,内蕴着“技术为体、文化为魂”的规律。让科技的真、善、美可观可触可感,我们才能最大程度地兑现“科技让生活更美好”的愿望。

(摘编自刘根生《技术也可以“诗意盎然”》)

同类题4

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    The bed should be reserved as a place for sleep, but people tend to read an iPad a lot in bed before they go to sleep.

    Charles Czeisler, a professor at Harvard Medical School, and his colleagues got a small group of people for an experiment. For five days in a row, the people read either a paper book or an iPad for four hours before sleep. Their sleep patterns were monitored all night. Before and after each trial period, the people took hourly blood tests to paint a day-long picture of just how much melatonin (褪黑激素) was in their blood at any given time.

    When subjects read on the iPad as compared to the paper books, they reported feeling less sleepy at night and less active the following morning. People also took longer to fall asleep on the iPad nights, and the blood tests showed that their melatonin secretion (分泌) was delayed by an hour and a half.

    The researchers conclude in today's journal article that given the rise of e-readers and the increasingly widespread use of e-things among children and adolescents, more research into the long-term consequences of these devices on health and safety is urgently needed. Czeisler and colleagues go on, in the research paper, to note:“Reading an iPad in bed may increase cancer risk.”

    However, software has been developed that can reduce some of the blue light from the screens of phones and computers according to time of day, and there are also glasses that are made to filter (过滤) short wavelengths. While they seem like a logical solution for the nighttime tech users, it needs more research.