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【单选题】
Questions 23-28 ?Read the magazine article below about a new tape storage system. ?For questions (23-28), choose the correct answer. ?Mark one letter (A, B or C) . TapeStore: A NEW TAPE STORAGE SYSTEM TapeStore is a new kind of tape storage system which can store up to 6,000 computer tapes. No other tape storage system can hold as many computer tapes as TapeStore. The tapes look exactly like video cassettes. Many hundreds of data files can be stored on each tape, up to a maximum of 500 million bytes of data. If you stored the same amount of information on paper, you would need nearly 4.5 billion printed pages. The machine is a tall black box with a mechanical arm. The machine is 2.5 metres high and 3 metres wide. This is how it works. Each tape has a code printed on it. You feed the code number into TapeStore, which then looks for the code. As soon as TapeStore locates the code, the arm reaches in and pulls out the tape. The system is very fast. It takes the mechanical arm about 10 seconds to find the tape it is looking for. The machine then searches the tape to extract the required file, and this take Less than a minute. A human technician would have to locate and remove the tape by hand,and could take at least an hour to find the right file on the tape. Some of the world's biggest companies, including banks, insurance companies,airlines, telephone companies, utilities and computer centres, have bought the system.They like it particularly because the system guarantees the security of their data. TapeStore was originally developed in Canada and is now being marketed world-wide. In Europe alone, 750 have already been installed at a cost of 480,000 dollars each. TapeStore is better than similar storage systems because
A.
it can also take video cassettes.
B.
it is much smaller.
C.
it holds more information.
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【单选题】人体寄生虫病的传染源包括
A.
病人和带虫者
B.
医学节肢动物
C.
所有野生动物
D.
所有家畜
E.
病人、带虫者、感染的动物
【多选题】用0.l0mol/LHCl滴定0.l0mol/LNa2CO3至酚酞终点,Na2CO3的基本单元错误的是()。
A.
Na2CO3
B.
2Na2CO3
C.
1/3Na2CO3
D.
3Na2CO3
【多选题】用0.l0mol/LHCl滴定0.l0mol/LNa2CO3至酚酞终点,Na2CO3的基本单元错误的是()。
A.
Na2CO3
B.
2Na2CO3
C.
1/3Na2CO3
D.
1/2Na2CO3
【简答题】分析下列材料并回答问题。 材料(一) 党在过渡时期的总路线的实质,就是使生产资料的社会主义所有制成为我国国家和社会的唯一的经济基础。 材料(二) 搞社会主义羊肉不好吃了,这个社会主义就值得考虑了。还有北京的烤鸭,南京的板鸭,云南的火腿,看来是退化了,还有各种布匹等等,花样少了,质量坏了。搞社会主义应该更好些。 问题: (1)材料(一)中的“实质”、“唯一”的提法反映了什么? (2)为什么进入社会主...
【单选题】()是以腊肉为主料的菜肴。
A.
湖南腊味合蒸
B.
羊肉串
C.
牛肉炖土豆
D.
北京烤鸭
【单选题】患者,女性,62岁。慢性咳嗽、咳痰10年, 气促2年,逐渐加重。查体:桶状胸,叩诊 过清音,两肺底部散在湿啰音。X线示: 两肺透亮度增加,肋间隙增宽,两下肺纹 理增多紊乱。提示该患者最可能发生了
A.
肺心病
B.
支气管扩张
C.
肺炎
D.
COPD
E.
支气管哮喘
【多选题】向1.00L 0.3mol/L的NaOH溶液中缓慢通入CO 2 气体至溶液增重8.8g,所得溶液中 [     ]
A.
溶质为Na 2 CO 3
B.
1/2c(Na + )=c(HCO 3 - )+c(CO 3 2- )+c(H 2 CO 3 )
C.
溶质为Na 2 CO 3 、NaHCO 3
D.
c(Na + )=c(HCO 3 - )+2c(CO 3 2- )+c(OH - )-c(H + )
【单选题】人体寄生虫病的传染源包括
A.
仅有病人和带虫者
B.
医学节肢动物
C.
所有野生动物
D.
病人、带虫者、感染的动物
【单选题】人体寄生虫病的传染源包括
A.
病人和带虫者
B.
医学节肢动物
C.
所有野生动物
D.
病人、带虫者、感染的动物
E.
所有家畜
【单选题】人体寄生虫病的传染源包括
A.
病人、带虫者、感染的动物
B.
仅有病人和带虫者
C.
医学节肢动物
D.
所有野生动物
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