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患者男性，21岁，间断腰背疼痛1年．夜间及晨起明显，近1周无诱因出现左膝关、节肿痛该患者应高度怀疑（）
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If the period between twenty and thirty is the critical one in the formation of intellectual and professional habits, the period below twenty is more important still for the fixing of personal habits, properly so called, such as vocalization and pronunciation, gesture, motion, and address. Hardly ever is a language learned after twenty spoken without a foreign accent. Hardly, ever, indeed, can he even learn to dress like a gentleman-born. Hardly ever, indeed, no matter how much money there be in his pocket, can he eve n learn to dress like a gentleman-born.
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属于I类切口的是（）
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扩展基础具有良好的抗弯和抗剪性能，适用于竖向荷载较大、地基承载力不太高、基础底面较大的情况和需要浅埋的情况，并能承受一定的水平力和力矩。
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平曲线设置缓和曲线后，因有内移值，所以曲线半径为R+⊿R(内移值)。()
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评比性文化与非评比性文化（中性文化）
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当发生危机船员生命的恶性事故准备弃船时，（）船舶失电2h后，系统自动停止记录数据，数据将随数据保护舱回收后得到恢复。
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某新生儿，日龄5d，出生体重3kg，目前体重2.8kg，妈妈很担心孩子的体重会继续降低，护士向妈妈解释孩子的体重将会恢复正常，下列解释正确的是
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当国外海岸电台（站）用“AAIC”询问我国交通系统船舶电台（站）时，应回答（）.