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【单选题】
有两列沿相反方向传播的相干波,其波动方程分别为y1=Acos2π(vt-x/λ)和y2=Acos2π(vt+x/λ)叠加后形成驻波,其波腹位置的坐标为:()
A.
x=±kλ
B.
x=±( 2k+1)λ
C.
x=± kλ
D.
x=±(2k+1)λ/4(其中k=0,1,2,…)
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【单选题】物流企业常利用优秀的物的物流服务人员、一流的物流服务水准、良好的物流服务设施和快速有效的物流服务等系列( ),去吸引和满足更多的物流用户。
A.
物流核心产品
B.
.物流有形产品
C.
物流产品附加(延伸产品)
D.
物流期望产品
【判断题】某制鞋有限公司,某年 7 月 22 日至 8月 7 日,接连出现 3 例含苯化学物及汽油中毒患者(经职业病医院确诊)。 3 名女性中毒者都是在该公司生产流水线上进行手工刷胶的操作工。有关人员到工作现场调查确认:(正确)在长 7错误m、宽正确2m 的车间内,并列 2 条流水线,有近百名工人进行手工刷胶作业;(2)车间内有硫化罐、烘干箱、热烤板等热源,但无降温、通风设施,室温高达 37.2℃; (3)...
A.
正确
B.
错误
【简答题】在 Excel 2010 中 是计算和存储数据的文件。
【简答题】Bill told me about a fascinating research project he was working on to study internal communications at some of Europe’s largest and most progressive companies.
【判断题】The sales, debts, and resources of some of the largest multinational firms exceed the gross national product, the public and private debt, and the resources, respectively, of some nations.
A.
正确
B.
错误
【简答题】Each winter, the rugged North Shore serves up some of the largest and most impressive ocean waves on the planet.Giant waves make their long journey across the northern Pacific to the area’s shoreline....
【简答题】. Some of Raphael’s works are found in the Apostolic Palace of The Vatican, where the frescoed Raphael Rooms were the central, and the largest work of his career.
【简答题】Bill told me about a fascinating research project he was working on to study internal communications at some of Europe's largest and most progressive companies.
【单选题】在Excel2010的( )是计算和存储数据的文件。
A.
工作簿
B.
工作表
C.
单元格
D.
工作区
【简答题】After building bridges, railways and some of the largest ships in the world, Brunel was ___________ the greatest engineer in Britain.
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