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对西安地区150例0~3岁儿童进行了六种微量元素:钙、锌、铜、铁、镁、硒的检测,发现微量元素缺乏可导致急慢性感染、免疫力低下、小儿营养不良、贫血、发育迟缓等症状。并对小儿营养不良、喂养不当进行矫正。其中铁、钙、锌同时缺乏占50%。 相似文献
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教师讲评习题前一定要多花功夫,认真做题、研题,这样讲解才不会出现失误,才能深入浅出,文章介绍了笔者对教师讲评2013年高考上海卷第20题的分析与思考,纠正了教师错误的分析求解思路. 相似文献
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The corrected Stefan-Boltzmann law of black holes in the frame of a generalized uncertainty principle is derived through the Planck equation of thermal radiation. The result is different from the fiat spacetime: a corrected T term induced by the generalized uncertainty principle emerges; the coefficient of the T4 term is no longer a constant while related with the spacetime in the vicinity of the event horizon and the thin film model. Applying this corrected law to black hole radiation, the highest temperature in the final time of the radiation and the corresponding remnant with a mass of order of Planck mass are obtained. The lifespan of black holes is also corrected, however, the correction is extremely small. 相似文献
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通过对一个典型的电学实验题解答的分析,揭示中学物理教学中对误差的认识偏差,提出纠正的方法. 相似文献
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