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当前学科：电气工程师发输变电
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某供电部门将配电线路导线由LGJ-25更换为LGJ-35。在输送负荷不变的条件下，忽略更换前后线路电抗值的变化，简化计算换线后降低功率损耗（）（LGJ-25导线电阻R1=1．38Ω／km，LGJ-35导线电阻R2=0．85Ω／km）。
A
60.8％
B
50.6％
C
45.3％
D
38.4％
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A: Good morning．My name is Mr．Brown．I'm from Australia．Here is my card. B: Thank you．I'm pleased to meet you, Mr．Brown．My name is Kathy Perless, the representative of GREen Textile Import and Export Corporation. A: Pleased to meet you too, Ms．Perless．I travel a lot every year on business, but this is my first visit to your country．I must say I have been much impressed by your friendly people. B: Thank you for saying so．Have you seen the exhibition halls? On display are most of our products, such as silk, woolen knitwear, cotton piece goods, and garments. A: Oh, yes．I had a look yesterday．I found some of the exhibits to be fine in quality and beautiful in design．The exhibition has successfully displayed to me what your corporation handles．I've gone over the catalogue and the pamphlets enclosed in your last letter．I've got some idea of your exports．I'm interested in your silk blouses. B: Our silk is known for its good quality．It is one of our traditional exports．Silk blouses are brightly colored and beautifully designed．They've met with great favor overseas and are always in great demand. A: Some of them seem to be of the latest style．Now I've a feeling that we can do a lot of trade in this line．We wish to establish relations with you. B: Your desire coincides with ours. A: Concerning our financial position, credit standing and trade reputation, you may refer to Bank of Hong Kong, or to our local Chamber of Commerce or inquiry agencies. B: Thank you for your information．As you know, our corporation is a state-owned one．We always trade with foreign countries on the basis of equality and mutual benefit．Establishing business relations between us will be to our mutual benefit．I have no doubt that it will bring about closer ties between us. A: That sounds interesting．I'll send a fax home．As soon as I receive a definite answer, I'll make a specific inquiry. B: We'll then make an offer as soon as possible．I hope a lot of business will be conducted between us. A: So do I.
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