单选题
发布日期:2021-03-22
water depth
keel
center of flotation
center of buoyancy
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100级或10000级监督下局部100级的洁净厂房适用于生产()
某30万t/a合成氨厂,合成塔进气流量为900000Nm 3/h,进塔气中氨含量3.5%,出塔气中氨含量17.6%,该合成塔装催化剂90m 3,试计算: (1)空间速度; (2)氨净值; (3)合成塔产氨速率。
女,40岁,发现颈部肿大6年,近半年来常感心悸,多汗,食量加大,检查:无突眼、甲状腺Ⅱ。肿大、结节状,脉搏116次/分,心、肺、腹无异常发现,其诊断可能是()。
如下哪一类风险是假设被检查的方面缺乏补偿控制()
女性,6岁。睡后遗尿,劳累尤甚,平素少气懒言,神软乏力,面色苍黄,食欲不振,大便溏薄,形体偏瘦,常自汗出,苔薄嫩,脉少力。治疗首选方剂为()
种子园
空车走行公里
常用推力轴承的三种结构形式是什么?推力轴承由哪几部分组成?液压支柱式推力轴承有哪些优点?
主要包括厂容厂貌、产品外观及包装、企业技术工艺设备特性等三个方面属于企业文化的()
图为地面气旋、反气旋流场示意图,北半球气旋为()。
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