单项选择题

磁表面存储器中在磁头写入线圈中通入不同波形的写入电流，产生的磁场将磁头下方的一个小区磁性材料磁化，利用不同磁化方向的剩磁，可存储二进制信息。按照写入电流之差别形成不同的记录方式，常用的FM制记录方式，要求用(5)表示存储的代码0或1。其特点是(6)工作比较可靠。

A.每个信息周期写电流不同的相位
B.每个信息周期内电流翻转的不同频率
C.每个信息周期通入不同方向的电流
D.每个信息周期通入或不通入写入电流
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单项选择题
某女，59岁，有Ⅱ型糖尿病病史10年，经饮食控制、运动、口服降糖药治疗，效果不理想。今日开始加用胰岛素治疗开始治疗时一般选用（ ）
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单项选择题
听力原文：M: Hello, Campus Daily, advertising department. This is Mark speaking.W: Hi. I'm calling to place a couple of ads.M: SurE.Under what classification?W: Well, I want one in the 'Roommate Wanted' section.M: All right. And how would you like that to read?W: OK, it should read Female roommate wanted for pleasant, sunny two-bedroom apartment on Eliiewood Avenue, three blocks form. campus. Share rent and utilities. Available September 1. Call between 5 and 9 p.m. and ask for CeliA.M: FinE.And what about your other ad?W: That one I'd like under 'Merchandise for Sale', and I'd like it to read 'Matching blue and white sofa and easy chair, excellent condition, $ 350 or best offer. Call between 5 and 9 p. m. and ask for CeliA.' Did you get all that?M: Uh-huh. You'll want your phone numbers on these, right?W: Oh, surE.Thanks for reminding me--it's 555-6972.M: And how long do you want these ads to run?W: For a week, I supposE.How much would that be?M: It's five dollars a week per linE.Each of your ads will take up three lines, so that's $ t5 per aD.Where does Mark work?A.At a newspaper.B.At an advertising agency.C.At a furniture storE.D.At a real estate officE.
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