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当前学科：变压器检修工（高级）
题目：
问答题
与普通双绕组变压器相比，自耦变压器有何优缺点？
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Dear Sirs, RE: COUNTER-OFFER FOR MOUNTAIN BICYCLES Thank you for your letter about the offer for the captioned mountain bicycles．Although we appreciate the quality of your bicycles, their price is too high to be acceptable．Refering to the sales contract No．8998, you will find that we ordered 1000 bicycles with the same brand as per the terms and conditions stipulated in that sales contract, but the price was 15% lower than your present price．Since we placed the last order, price for raw materials has been decreased considerably．Retailing price for your bicycles here has also been reduced by 5%．Accepting your present price will mean great loss to us, let alone profit．We would like to place repeat orders with you if you could reduce your price at least by 15%．Otherwise, we have to shift to the other suppliers for our similar request. We hope you take our suggestion into serious consideration and give us your reply as soon as possible. Yours truly,
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真空滚揉有效工作时间一般为（）小时。
设置＿＿＿＿＿＿＿＿＿，能够对企业与外部环境，尤其是与市场、顾客之间关系的协调，发挥积极作用。
宣告公民失踪的条件是（）。
简述子宫内膜异位症的常见症状。
在常规临床工作中测得的RF类型是（）
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