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设有一列简谐横波: 其中x,y的单位是cm,t的单位是s。试求: (1)振幅A,角频率ω,波速u和波长λ; (2)振动初相位是的位置x。
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用15MeV回旋回加速器对钢焊缝进行射线照相,显影后底片上布满了斑点,产生斑点的原因可能是()
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确定胜任特征的过程需要遵循一条基本原则。
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患者男性,58岁。胸闷痛反复发作二年,加重一日,现胸闷如窒而痛,气短,喘憋,心烦易怒,咯黄痰,头昏沉,大便干,夜寐不安,舌暗红苔黄腻,脉滑数弦。若病情迁延不愈,并出现心悸,喘促,不能平卧,动则甚,肢体浮肿,畏寒肢冷,舌淡,苔白滑,脉沉细。此时治疗应选用()
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碱一骨料反应中没有()。
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全胃肠道外营养护理要点有()。
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请根据以下资料,制作装船通知。 L/C NO. : 513179/WL DATE OF ISSUE: 18TH JULU, 2009 EXPIRY: DATE 15TH NOV. , 2009 PLACE IN CHINA LATEST SHIPMENT: 30TH OCT. , 2009 ISSUING BANK: HABIB BANK LIMITED CENTRAL BR. 2 - HA, KARACHI PAKISTAN APPLICANT: JEVAN TRADING CO. , 15 MARVI BLGH. MARRIO ROAD P.O. BOX 4666, KARACHI- 78000 BENEFICIARY: GUANGHUA LIGHT INDUSTRIAL PRODUCTS IMPORT AND EXPORT CORP. , 62 JIANGXI ROAD, HANGZHOU, CHINA ALL SHIPMENTS UNDER THIS CP, EDIT MUST BE ADVISED BY YOU IMMEDIATELY AFTER SHIPMENT DIRECT TO EASTERN FEDERAL UNIONINSURANCE CO. LTD. QUNAR HOUSE, M. A. JINNAH ROAD, KARACHI ANDTO THE OPENERS, REFERRING TO THEIR COVER NOTE NO. 099421/94/GAL/JEVAN AND A COPY OF SHIPMENT ADVICE IS REQUIRED. COMMODITY: LOVELY BRAND ALARM CLOCKS 720PCS ATUSD 2.00 PER PC FOBKARACHI SHIPPING MARKS: ABDOLTAH /KARACHI/No. 1 -UP PACKING IN CARTONS OF 24 PCS EACH G. W. 424KGS N. W. 369KGS SHIPMENT FP, OM NINGBO TO KARACHI ON 28TH OCT. , 2009 BY S.S. LONGXING B/L NO. 123 INVOICE NO: GLI200907 INVOICE DATE: 20TH OCT., 2009
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在观察y轴输入电压波形时,波形的周期数是()的整流倍数。
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自我报告技术常用于态度测量,请陈诉在市场调查中使用的自我报告技术。
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论述产蛋家禽的钙磷营养特点。