第3题: [单项选择]What do we learn from the conversation A. He feels they have done a wise thing. B. He doesn’t think they should move. C. He thinks it is better to invest later. D. He thinks it is unwise to buy stocks. 参考答案:D 答案解析:[听力原文] W: You know, the Smiths have invested all their money in stocks. M: They may think that
第15题: [单项选择]梁桥轻形桥台的计算内容不包括() A. 将桥台视为上下端铰支,承受竖向荷载和横向荷载作用的竖梁(简支梁,验算墙身圬工的偏心受压强度和抗剪强度。 B. 将台身和翼墙(包括基础视作在弹性地基上的短梁,验算桥台在该平面内的弯曲强度。 C. 计算各截面的内力,进行配筋设计和验算 D. 验算地基土的承载力。 参考答案:C
第21题: [单项选择]下列设备中,读写数据最快的是______。 A. 软盘 B. CD-ROM C. 硬盘 D. 磁带 参考答案:C 答案解析:[解析] 存储器(ROM、RAM)中各种存储器读写速度的比较 [评析] 软盘、光盘(CD-ROM)、磁带和硬盘都是外存储器。硬盘通过将数据暂存在一个比其速度快得多的缓冲区来提高与CPU交换数据的