参考答案:In the morning she got up and started out a little early.She walked into the wholesale district,but as the thought of applying came with each passing firm,her heart shrank.What a coward she was,she thought to herself.She walked on and on,and finally did go Into one place,with the old result.She came out feeling that luck was against her.It was no use. Without much thinking,she reached a great fair store with a large crowd of shoppers.This readily changed her thoughts.It was here-that she had intended tO come and get her new things.Now for relief from distress,she thought she would go in and see.She would look at the jackets.There is nothing in this world more delightful than that middle state in which we,lured by desire and yet deterred by want of decision at times,mentally balance
第19题: [单项选择]高频场合使用的磁性材料是()。 A. 电工纯铁 B. 硅钢片 C. 铁氧体磁性材料 D. 铁镍合金 参考答案:B
第20题: [单项选择]DMA方式的特点是 (10) 。 A. 整个系统没有CPU B. 计算机的CPU一直参与活动 C. 传输过程中,没有CPU的参与 D. 在计算机系统中不可能发生 参考答案:C 答案解析:DMA方式是计算机的存储设备与计算机外部接口数据交换方式之一。在传输开始和结束时,需要CPU的参与。而传输一旦建立,CPU就不再参与。
第37题: [单项选择]When I try to understand ______ that prevents so many Americans from being as happy as one might expect, it seems to me that there are two causes. A. why it does B. what it does C. what it is D. why it is 参考答案:C 答案解析:[解析] “it is…that”是强调结构,可先排除A、B两项。that从句中的prevents缺主语,排除D项。