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Fill in the blanks with appropriate word or words given below：attention price list discount first order payment enquiry qualityquantity samples shipment meet by separate post encloseDear Sirs,We are very pleased to receive your _ of 12 January andour illustrated catalogue and _____ giving the details you ask for. Also ———————————————————we are sending you some ———————— and feel confident that when you have examined them you will agree that the goods are both excellent in ———————and reasonable in price.On regular purchases in ———— of not less than 100 dozen of individual items we would allow you a ————of 2%. ——————- is to be made by irrevocable L/C at sight.Because of their softness and durability, our all cotton bed-sheets and pillowcases are rapidly becoming popular and after studying our prices you will learn that we are finding it difficult to ———the demand. But if you place your order not later than the end of this month, we would ensure prompt ——————.We invite your ————to our other products such as table-cloth and table napkins, details of which you find in the catalogue, and look forward to receiving your ——————————————————.Yours sincerely,

霍耳效应从本质上讲是运动的带电粒子在磁场中受( )作用而引起的偏转。

A. 电场力
B. 洛伦兹力
C. 安培力

霍耳器件应用广泛,可以用来测量( )

A. 电流
B. 压力
C. 转速
D. 半导体材料的参量

实验中测量霍耳电压时,通过测量不同I和B方向时的电压值并求平均来减小实验误差,主要包括下列哪些误差( )

A. 由不等势效应引起的与电流方向有关但与磁场方向无关的附加电压
B. 由实际载流子速率与平均速率不同引起的附加温差电动势
C. 由焊点接触电阻不同产生的温差电动势产生霍耳效应引起的附加电压
D. 由温差电流中的载流子速度差异在磁场作用下产生的埃廷斯豪森效应