皮皮学，免费搜题
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【单选题】
听力原文：(Woman) Hello, Juan. This is Helen Luna at Magnum Heating Supplies. I've been going over our customer records, and I see that you currently use our Model 200 filters for your heating systems. I'm just calling to ask. Have you considered upgrading to the Model 201 filters? (Man) I guess it's a possibility, but the 200's seem to be doing the job just fine for us. (Woman) Well, the reason I ask is that for the next 90 days the Model 201 filters will be on sale for the same price as the Model 200's you're using now, so this would be a good time to change to the newer model. (Man) Hmm. Let me talk about it with our maintenance staff and see what they think. What is the purpose of the woman's call?A.
She wants to upgrade her heating system.
B.
She wants to find out a price.
C.
She wants to sell a product.
D.
She wants to have a filter repaired.
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举一反三
【简答题】对社会购买力直接或间接影响的因素有哪些？
【多选题】机电产品市场的购买力受哪些因素的影响?
A.
受国家发展国民经济总方针、总政策的影响。
B.
与各个行业发展有关。
C.
机电产品自身技术水平的提高。
D.
利率、资本效用、贷款效用。
E.
机电市场市场属于专业市场。
F.
机电产品市场活动的理智性。
【简答题】影响居民消费品购买力的主要因素有哪些?
【单选题】采用扣件式钢管作高大模板支架时,支架立杆的搭设垂直偏差不宜小于( ),且不宜大于( )mm。
A.
1/200;100
B.
1/250;100
C.
1/400;100
D.
1/150;80
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