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隋朝时,中国经济的重心已开始南移,大量的粮食财富从南方运往全国,为此,公元605年,隋炀帝下令开凿贯通南北的京杭大运河的原因之一。( )
紧键联接与松键连联接的主要区别在于:前者安装后,键与键槽之间就存在有()。
痴呆一般起病较急,进展迅速。
科研项目申请书应写好哪几方面内容?
()不是行注目礼的规范。
齿面接触疲劳强度设计准则针对的齿轮失效形式是()。
关于发生MODS的条件,下列错误的是()。
某独立钢结构设备平台,其横向为框架结构,柱列纵向设交叉支撑,柱脚铰结(平板支座)。平台主次梁间采用简支平接,平台板采用带肋钢铺板,结构布置图详见下图。梁柱构件均选用轧制H型钢,全部钢材均为Q235-B,焊条采用E43型焊条。平台结构布置图 梁L-1与框架GJ-1横梁间的连接,如下图所示,采用10.9级M20的高强度螺栓摩擦型连接;连接处摩擦面抗滑移系数μ=0.35。L-1梁端剪力设计值V=136kN,考虑连接偏心的不利影响,剪力增大系数取1.3。试问,根据计算该连接处配置的螺栓数量应为下列何项数值?()
患者女性,38岁。突发上腹部阵发性绞痛,T39.1℃,寒战,厌食,放射至右肩部,怀疑为急性胆囊炎,胆囊结石。为明确诊断下一步应进行的检()
遵守医学伦理道德,尊重患者的知情(),为患者保守医疗秘密和健康隐私,维护患者合法权益。
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