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Computers are considered to be one of the greatest 1 in our time. 2 everywhere one goes and looks, there is al ways a computer . They are found in basically every household. It is such a 3 electronic device that it changes the way people run their lives. They are helpful in 4 the most complex problems. They can also help you 5 relevant information to make a decision. For example, if you want to better your English, you can use the computer to 6 web pages on the Internet. In this way, you can 7 a reference library in English. Although it seems that the primary 8 of computers is to research on the Internet, they also have many other diverse 9 . For instance, during rush hour, when 10 traffic occurs, computers can use a direct satellite link to 11 you with up to date information. This way, you can judge the best road to take with 12 . With access to the Internet, office workers can even 13 their jobs at computer terminals( 终端 ) in their own homes. Technology is 14 all the time. There are now computers 15 enough to be carried around in your pocket. These would be an important news source for 16 . What is more, small computers could 17 be used in hospitals . A small computer 18 to a patient ’ s body could help a doctor evaluate the nature of the patient ’ s illness and 19 the best treatment. Computers have already brought great 20 to ou r lives, and will continue to do so in the future.
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【简答题】三七粉( )。 查看材料
【单选题】图示单元体的三个主应力 、 、 是 。
A.
70MPa,60MPa,30MPa ;
B.
-70MPa,-60MPa,-30MPa
C.
60MPa, 30MPa,-70MPa ;
D.
30MPa, -60MPa, -70MPa.
【简答题】已知离散系统的差分方程为y(n+2)-3y(n+1)+2y(n)=x(n+1)-2x(n),x(n)=2 n u(u),y zi (0)=0,y zi (1)=1,求系统的零输入响应,零状态响应及完全响应。
【简答题】磁粉探伤的检测材料只能是()材料。
【多选题】粉芯类材料的特点有()
A.
粉芯材料的磁导率低
B.
粉芯材料容易饱和
C.
粉芯材料的磁导率会随外加直流磁场的增加而增加
D.
粉芯材料中有气隙
【单选题】企业日常的库存现金限额应由( )根据企业的实际需要核定一个限额。
A.
财政部门
B.
税务部门
C.
开户银行
D.
工商部门
【判断题】楔键装配时,合格后,轻敲入内,与套件轴向周、向紧固可靠。
A.
正确
B.
错误
【单选题】1865年,萨克斯(Julius von Sachs)他和克诺普(W.Knop)一起设计了一种水培植物的装置,进行栽培植物试验。同时应用化学分析的方法分析植物体的元素组成,首次提出了10元素学说。他们是现代无土栽培的先驱。10元素指的是( )
A.
C H O N P K Ca Mg S Fe
B.
C H O N P K Fe Mn Zn B
C.
N P K Ca Mg S Fe Mn Zn B
D.
N P K Ca Fe,Mn,Zn,B,Cu,Mo
【简答题】琥珀粉( )。 查看材料
【判断题】楔键装配时,合格后,轻敲入内,与套件轴向周、向紧固可靠。A. 对 B. 错
A.
正确
B.
错误
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