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【简答题】
It looks like a mobile phone, but the service is much cheaper. It acts like a mobile phone, but only in your own city. Beyond the city walls, it’s useless. “Little Smart”, also called “xiaolingtong”, has always been compared to mobile phones. But actually, it is more like one of those cordless phones(无绳电话) used around the home. The only difference is that this one reaches much further than from the bathroom to the living room. It can travel across an entire city. Cheap costs are the main reason for the success of Little Smart. It costs 25 yuan a month for the line and about 0.1 yuan per minute to use. A mobile phone, on the other hand, can cost four or five times as much. What’s more, unlike mobile phones, there’s no fee(费) for incoming calls. So these low charges have attracted many users. But, Little Smart is not really that smart. Users often complain about its bad voice quality. And there are not as many stations to pick up its signals as there are for mobiles. “I couldn’t receive a phone call if I was on a bus,” said Li Ping, a user in Hangzhou. “It worked fine when I stood still, but there were breaks in signal when I was moving.” Scientists are trying to make Little Smart more user-friendly. Messaging and Internet access(接入) have been added to the service. And the latest Little Smart handset even has color screen. 小题1:Why is Little Smart popular in China? A.It looks like a mobile phone. B.The service is much cheaper. C.There is no fee for incoming calls. D.All of the above. 小题2: How is the charge of Little Smart? A.About 10 fen per minute to use. B.It costs four or five times more than a mobile phone. C.It only costs 25 yuan each month. D.There’s no fee for calls. 小题3: Why are users not satisfied with Little Smart? A.They can’t hear each other clearly out of the city. B.There are so few stations for Little Smart to pick up its signals. C.When you use it, you must stand up. D.The charges are low. 小题4: The underlined word “handset” in the last paragraph means “______”. A.the hand bag B.telephone C.service D.mobile phone 小题5: What can we infer from the passage? A.It’s wrong to say that Little Smart is smart. B.Scientist are trying to make Little Smart smaller. C.Little Smart will be better than today. D.People will change Little Smart into a mobile phone.
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【单选题】中继器主要功能是实现( )。
A.
只放大模拟信号
B.
只放大数字信号
C.
数字信号与模拟信号的转换
D.
放大模拟信号和数字信号
【单选题】中继器的主要功能是实现( )。
A.
放大模拟信号或数字信号
B.
数字信号与模拟信号的转换
C.
只放大模拟信号
D.
只放大数字信号
【多选题】根据《环境影响评价技术导则——地面水环境》,地下水环境影响评价原则是(    )。
A.
评价应以地下水环境现状调查和地下水环境影响预测结果为依据,对建设项目不同选址(选线)方案、各实施阶段(建设、生产运行和服务期满后)不同排污方案及不同防渗措施下的地下水环境影响进行评价,并通过评价结果的对比,推荐地下水环境影响最小的方案
B.
地下水环境影响评价采用的预测值未包括环境质量现状值时,应叠加环境质量现状值后再进行评价
C.
Ⅰ类建设项目应重点评价建设项目污染源对地下水环境保护目标(包括已建成的在用、备用、应急水源地,在建和规划的水源地、生态环境脆弱区域和其他地下水环境敏感区域)的影响。评价因子与影响预测因子相同
D.
Ⅱ类建设项目应重点依据地下水流场变化,评价地下水水位(水头)降低或升高诱发的环境水文地质问题的影响程度和范围
【单选题】听力原文:M: I'd like a ticket to New York Tuesday morning. I have an appointment at 9: 00. W: We only have a flight arriving there at 9: 30. I am afraid you'll have to take a night flight arriving there a...
A.
At 9:00.
B.
At 9:30.
C.
At 7:30.
D.
At 8:00.
【单选题】( )的主要功能是实现数字信号与模拟信号之间的转换。
A.
网卡
B.
集线器Hub
C.
路由器
D.
调制解调器
【单选题】依据《环境影响评价技术导则地面水环境》,某建设项目污水排入一中型河流,现状调查范围为排污口上游lkm至下游4km,河流水深10m,河宽30m。依据《环境影响评价技术导则地面水环境》,该河流水质取样点的布设数量至少为()个。
A.
3
B.
6
C.
12
D.
18
【单选题】听力原文:W: Hello, this is Freda speaking. M: Hello, Freda. It is me-Steven. I was wondering if you'd like to watch football games with me. W: Yes, I'd like to. But when? M: Well, how about Friday evening...
A.
In a classroom.
B.
On the phone,
C.
In a restaurant.
D.
In the school.
【单选题】依据《环境影响评价技术导则 地面水环境》,以下地表水环境影响预测模型中可用于河流混合过程段预测的是( )
A.
河流完全混合模式
B.
河流一维稳态模式
C.
S-P模式
D.
河流二维稳态混合模式
【单选题】依据《环境影响评价技术导则 地面水环境》,某项目地面水环境影响评价工作等级为二级,污水排放量7500m3/d,以下表述正确的是( )。
A.
河流规模愈大,排污口下游应调查的河段长度愈大
B.
河流规模愈大,排污口下游应调查的河段长度愈小
C.
污水水质愈复杂,排污口下游应调查的河段长度愈大
D.
污水水质愈复杂,排污口下游应调查的河段长度愈小
【单选题】调制解调器的主要功能是实现______。
A.
模拟信号与数字信号的转换    
B.
数字信号的传输
C.
模拟信号的放大    
D.
数字信号的编码
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