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男性，72岁，消瘦2年，明显乏力、食欲缺乏、腹泻，进行性加重3个月；查体：恶病质，无欲状，甲状腺肿大，无明显杂音，肺（-），心率54次／分，心尖部2～3级收缩期吹风样杂音，较粗糙，腹呈舟状，双下肢肌力2～3级，腱反射减弱，便潜血，胸片阴性首先应进行的检查是（）
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被告人杨某，男，1994年5月1日生，中学生。2009年8月29日杨某到同学家玩，因同学出去了，感到无聊，想找本书看，无意中发现抽屉里的小口径步枪及子弹数发。由于好奇，随即拿起枪并装上子弹，恰好这时候他看到楼下街道上有一青年，便想吓唬他一下。杨某用枪瞄准他前面的水泥地击发，结果打中前面的一位老人，经抢救无效而死亡。杨某后来在父母的陪同下到当地派出所投案自首。杨某行为时的主观罪过是什么？
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植物体有乳汁且花冠联合的科是（）
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何首乌的性状鉴别特征是什么？
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生产性毒物进入人体的最主要途径是（）
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Claim reimbursement by means of a Time draftA Credit available by acceptance 1.Name of Issuing Bank Place and date of issue Dresdner Bank Hamburg, 15 April, 200 x To: China National Light Indus- This Credit is advised through trial Products Imp. & Exp. ICBC, Tianjin Corp., Tianjin Branch, Tianjin Dear Sirs, By order and for account of the applicant, we hereby issue an Irrevocable Documentary Credit No. H169087 for USD25,730.00 to expire on 31 May, 200× at Tianjin available with The Industrial and Commercial Bank of China, Tianjin by acceptance against beneficiary's draft at 90 days sight drawn on ICBC, Tianjin (advising bank) and the documents detailed herewith: ______________________________________________________________________________ Partial shipments not allowed. Transhipment allowed. All charges outside Issuing Bank's country including acceptance commission are for account of beneficiary. ______________________________________________________________________________ If this Credit shall be duly accepted on presentation to drawee bank and duly honoured at maturity. ______________________________________________________________________________ Bank-to-Bank Instructions: Accepting bank is to draw their time draft on Bank of America, New York payable at a fixed future time i. e. maturity of accepted beneficiary's drafts. Reimbursements under this Credit are subject to the Uniform Rules for Bank-to-Bank Reimbursements under Documentary Credit, ICC Publication No. 725. 2. From: Dresdner Bank, Hamburg To: Bank of A.merica, New York Reimbursement Authorisation We hereby issue a Reimbursement Authorisation to you to accept and pay a time draft drawn on you subject to Uniform Rules for Bank-to-Bank Reimbursements under Documentary Credits, ICC Publication No. 725 upon receipt of such draft presented by the Claiming Bank——The Industrial and Commercial Bank of China, Tianjin in accordance with the following: (1)Credit number: H169087 (2)Currency and amount: USD25, 730. 00 (3)Additional amounts payable: no (4)Claiming Bank: ICBC, Tianjin (5)Parties responsible for charges: beneficiary (6)Tenor of draft: maturity of accepted beneficiary's draft (7)Drawer: ICBC, Tianjin (8)Party responsible for acceptance commission: beneficiary 3. beneficiary's draft Due 3 August, 200× Exchange for USD25, 730. 00 Tianjin, 4 May, 200× At 90 days sight pay to the order of Ourselves the sum of US dollars twenty five thousand seven hundred and thirty only Drawn under Dresdner Bank, Hamburg L/C No. H169087 dated 15 April, 200×. To The Industrial and Commercial Bank of China, Tianjin For China National Light Industrial Products Imp. & Exp. Corp., Tianjin Branch, Tianjin signature ACCEPTED 5 May, 200× to mature 3 Aug., 200× For The Industrial and Commercial Bank of China, Tianjin signature 4.Please fill the following particulars in two blank forms to write a Letter of Reimburse Claim and to issue a Time Draft: (1)Addressee or drawee: Bank of America, New York (2)Sender or drawer: The Industrial and Commercial Bank of China, Tianjin (3)Amount: USD25,730.00 (4)Date of Letter of Reimbursement Claim and Draft: 24 July, 200× (5)Predetermined reimbursement date: 3 Aug., 200× (6)Payee: ICBC, Tianjin (7)Accounting procedure: crediting our Head Office account with you under your telex advice to us quoting our Ref. No. BP87654321. (8)Drawn clause: Drawn under Dresdner Bank, Hamburg L/C No. H169087 dated 15 April, 200×
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应用电泳技术进行患者血液中Hb的类型及贫血类型的临床诊断，其增高能表现“-轻型地中海贫血”的重要特征的血红蛋白是（）。
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磁感应强度B与介质磁导率？的比值为（）。
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2+2双反面组织编织采用了下列成圈机件（）。
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简述物种形成在生物进化中的意义。