单选题
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将窗口分割成四格,分别绘制正弦、余弦、正切和余切函数曲线,并加上适当的标注。
正常格式化可以通过技术手段恢复。
气胀式救生筏应每()检修一次。
一种微妙而又常常没有结果的解决冲突的办法是()
股东与经营者激励不兼容矛盾的根源在于委托代理制。
在炉水蒸浓过程中,当某种盐类的离子()首先达到饱和状态时,该种盐类并开始从溶液中析出,产生水垢或泥渣。
根据阿尔法策略示意图,回答以下问题。以下关于阿尔法策略说法正确的是()。
女性,36岁。右股骨上端疼痛20天,查体:右股骨上端肿胀,压痛,右髋关节活动受限。X片:右股骨颈及转子下溶骨性骨破坏。3年前患乳癌,施乳癌根治术。局部无复发。 最重要的辅助检查项目是()
某混凝土预制厂生产的预制构件中存在着蜂窝麻面、局部露筋、表面裂缝和强度不足等质量问题,为了提高产品的合格率,需进行质量分析。经分析计算,上述质量问题的累计频率分别为41.5%、73.5%、90.5%、和100%,则该预制构件的主要质量问题是( )。
男性,70岁,既往体健,10天前,曾应用庆大霉素抗感染治疗,尿量800ml,尿常规示Pro(+),可见颗粒管型,BUN18.8mmol/L,Cr373μmol/L,HGB12.1g/L庆大霉素对肾脏损伤的部位().
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