Task 4
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There was a time in early history of man when the days bad no names! The reason was quite simple: Men had not invented the week. In those days, the only division of times was the month, and there were too many days in the month for each of them to have a separate name. But when men began to build cities, they wanted to have a special day on which to trade, a market day. Sometimes these market day were fixed at every tenth day, sometimes every seventh or every fifth day. The Babylonians decided that it should be every seventh day. On this day they didn't work, but met for trade and religious festivals. The Jews followed their example, and kept every seventh day for religious purposes. In this way the week came into being. The Jews gave each of the seven days a name, but it was really a number af A. quite similar to the Romans’ B. mostly named after the gods of the Anglo - Saxons C. more or less the same as those the Egyptians are using D. but numbers [判断题]焊接作业指导书是制造焊件有关的加工和操作细则性文件。【判断题】
A.正确 B.错误 [单选题]有砟轨道路肩宽度，线路设计速度为160 km/h及以下的铁路，位于路堤上的路肩宽度不应小于（）m。
A.1 B.0.8 C.0.6 D.0.4 [多选题]对同杆(塔)塔架设的多层电力线路验电,应()。禁止作业人员越过未经验电.接地的线路对上层.远侧线路验电。
——[多选题] A. 先验低压.后验高压 B. 先验下层.后验上层 C. 先验近侧.后验远侧 D. 先验内侧.后验外侧 [单选题]SNI是接入网和业务节点之间的接口，位于接入网的（ ）。
A.数据交换侧 B.用户侧 C.用户侧 D.业务侧 [单项选择]微生物处理啤酒废水的方法有（）和好氧两种。
A. 曝气 B. 射流 C. 厌氧 [单项选择]贷款组合的信用风险（）。
A. 是系统性风险 B. 是非系统性风险 C. 既可能有系统性风险，又可能有非系统性风险 D. 以上都不对 [判断题]健康食堂应独立设置粗加工间、烹饪间。
A.正确 B.错误 [单项选择]我国流行的回归热的主要传播媒介是（）。
A. 蚊 B. 鼠 C. 蜱 D. 螨 E. 虱 [单项选择]Since it was the first time that I had been to the city, I was ________by the maze of streets in the city.
A. degraded B. bewildered C. evoked D. diverted [单选题]两路电源供电的低压线路带电工作应填用（ ）。
A.停电作业工作票 B.带电作业工作票 C.倒闸票 D.安全命令簿 [单选题] 施工单位应在其( )许可的范围内承揽铁路建设工程。
A.施工人数 B.施工经历 C.学历层次 D.资质等级 [单选题]传输网中使用的接收机一般收光功率范围是1280nm到1650nm，即接收机基本不分波长，这使收端单板互换成为可能。但我们平时使用光功率计测量光功率却有波长的选择项，是因为：（ ）
A.光功率计使用特殊的接收机，有接收波长区别的接收机； B.因为过来的光比较特殊，因此调整光功率计波长选择以示区别； C.只是一个障眼法，其实不调整波长选择也可以测试到功率； D.光功率计使用的接收机和传输网中接收机一致，只是在接收机前增加了一个滤波器，功率计上选择波长设 我来回答: 提交
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