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许多类胡萝卜素具有优良的生理活性，加工果蔬时要尽量保护。下面（ ）属于类胡萝卜素。
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果蔬中的维生素都是热敏性的，只要加工后的果蔬食品，基本不含维生素。
Role Play 1. The following is a talk among Mr. Chen, Miss Li and Mr. Smith regarding the terms of payment for the sales of sports shoes. Suppose you are Mr. Chen. Try to complete the following dialogue with some of the drills and expressions in Part Ⅱ and Ⅲ . The Chinese expressions in the brackets are for your reference only.S: Well, we’ve settled the questions of price, quality, quantity, packing, shipment and insurance. Now what about the terms of payment?C: (关于支付，我们通常要求按发票金额的100%，以保兑的、不可撤销的、以我方为受益人的信用证凭即期汇票付款。)L: With partial shipment and transshipment allowed clause, against surrender of full set of shipping documents to the negotiating bank here.S: I see. Could you make an exception and accept D/A or D/P?C: (恐怕不行，我们坚持用信用证方式付款。)S: I heard that you would accept different kinds of payment such as D/A and D/P.L: Quite right, but that all depends on circumstances.C: (我们只是在非常特殊的情况下才会同意其他的支付方式。)S: I’m a customer of long standing and we have been cooperating well for years. It’s a very special case, isn’t it?C: You know,（承兑交单或付款交单方式付款不适用于你方情况。）S: Why not?C: (只有在每次交易的金额不超过1,000 美元时，我们才可接受付款交单或承兑交单的方式付款。)S: You must be aware that when we open a letter of credit, we have to pay a deposit and there will be bank charges in connection with the establishment of a letter of credit.L: Yes, we know it.S: That will tie up my funds (capital) and add to the cost of my imports.L: You know, Mr. Smith. An irrevocable letter of credit gives both the exporter and importer the additional protection of the banker’s guarantee.C: (我们出口一向要求用信用证，反过来讲，我们进口也采用信用证。)S: How about 50% by L/C and the balance by D/P?C: I’m very sorry, Mr. Smith, but I’m afraid I can’t promise you even that.(我们唯一能做的事情就是在收到信用证之后25天交货。)S: Well, in order to close the deal, I agree to your proposal.C: (我真诚地希望我们之间今后的贸易额会进一步扩大。)S: Well, we’ve settled the questions of price, quality, quantity, packing, shipment and insurance. Now what about the terms of payment?C: (For payment, we usually require 100% value, Confirmed, and Irrevocable Letter of Credit in our favor, payable (available) by draft at sight)L: With partial shipment and transshipment allowed clause, against surrender of full set of shipping documents to the negotiating bank here.S: I see. Could you make an exception and accept D/A or D/P?C: (I’m afraid not. We insist on a letter of credit.)S: I heard that you would accept different kinds of payment such as D/A and D/P.L: Quite right, but that all depends on circumstances.C: (It is only under very special circumstances that we agree to other payment terms.)S: I’m a customer of long standing and we have been cooperating well for years. It’s a very special case, isn’t it?C: You know, (D/A or D/P payment is not applicable to your case.)S: Why not?C: (D/P or D/A is applicable only if the amount involved for each transaction is less than $ 1,000.)S: You must be aware that when we open a letter of credit, we have to pay a deposit and there will be bank charges in connection with the establishment of a letter of credit.L: Yes, we know it.S: That will tie up my funds (capital) and add to the cost of my imports.L: You know, Mr. Smith. An irrevocable letter of credit gives both the exporter and importer the additional protection of the banker’s guarantee.C: (We always require L/C for our exports. And the other way round, we pay by L/C for our imports.)S: How about 50% by L/C and the balance by D/P?C: I’m very sorry, Mr. Smith, but I’m afraid I can’t promise you even that. (The only thing we can do is to deliver the goods 25 days after we receive your L/C.)S: Well, in order to close the deal, I agree to your proposal.C: (I sincerely hope that the volume of trade between us will be even greater in the future.)
约翰·罗尔斯是二十世纪的著名政治哲学家，他反对传统的功利主义，认为正义是社会制度的主要美德，以下各项中，不属于他的著作的是（ ）。
约翰·罗尔斯不仅终生致力于政治哲学研究，而且积极融入现实政治，热衷于在课堂上引导学生讨论时政。（ ）
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