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【单选题】
A local-area network(LAN)is a communications network that(125)a variety of devices and provides a(126)for information exchange among those devices. The scope of the LAN is small typically a single building or a cluster(丛)of buildings. The LAN is usually owned by the same organization that owns the(127)devices. The internal data rate of LAN is at least several Mb/s.The basic of LAN communication is broadcasting. At each station, there is a transmitter/receiver that communicates over a(128)shared, By other stations. A transmission from any one station is(129)to and received by all other stations.A.
broadcast
B.
cable
C.
control
D.
interconnects
E.
internet
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【单选题】My father knows a lot about American culture, for he _____ there for 2 years, and then he returned home. [ ]
A.
stays
B.
stayed
C.
would stay
D.
have stayed
【多选题】产生职业危害的生产经营单位的工作场所应当符合的要求包括( )。
A.
职业危害因素的强度或者浓度必须高于国家职业卫生标准
B.
有与职业危害防护需求相适应的设施
C.
有配套的孕妇休息间等卫生设施
D.
生产布局合理，符合有害与无害作业分开的原则
E.
设施符合保护劳动者心理健康的要求
【单选题】Why will American need to expoit food in 1997?
A.
Because the farmers will need a lot of money.
B.
Because it will need money to buy oil.
C.
Because it will have too much food for its own use.
D.
Because it wants to help other countries.
【多选题】存在职业危害的生产经营单位的作业场所应当符合下列要求：（）。
A.
生产布局合理，有害作业与无害作业分开
B.
作业场所与生活场所分开，作业场所不得住人
C.
有与职业危害防治工作相适应的有效防护设施
D.
职业危害因素的强度或者浓度符合国家标准、行业标准
【简答题】Naturally ,American schoolchildren love holidays .And they get a lot of them each year .Besides having national holidays such as Thanksgiving and Presidents; Day off from school ,students get longer b...
【单选题】根据《作业场所职业健康监督管理暂行规定》（安全生产监督管理总局令第23号）第十二条规定，存在职业危害的生产经营单位的作业场所应当符合下列要求（）
A.
生产布局合理，有害作业与无害作业分开
B.
作业场所与生活场所分开，作业场所不得住人
C.
职业危害因素的强度或者浓度符合国家标准、行业标准
D.
以上三个条款都应当符合
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