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【简答题】
E-business, ___(1)___ from such terms as "e-mail" and "e-commerce", is the ___(2)___ of business on the Internet, not only buying and selling but also ___(3)___ customers and ___(4)___ with business partners. One of the first to use the term was IBM. Today, major ___(5)___ are rethinking their business in terms of the Internet and its new culture and capabilities.Comapanies are using the Web to buy ___(6)___ and supplies from other companies, to collaborate on sales promotions, and to do ___(7)___ research. Exploiting the convenience, ___(8)___ ,and world-wide reach of the Internet,many companies, such as Amazon.com, have already discovered how to use the Internet successfully. Increasingly, much direct selling is taking place on the Internet of computer-related equipment and software.One of the first to report sales in the millions of dollars directly from the Web was Dell.Travel ___(9)___ directly or indirectly as a result of Web research are becoming significant. Customer-orderable golf clubs and similar specialities are considered good ___(10)___ for the immediate future.
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【单选题】毕渥数是下列哪两项的比值?
A.
热辐射能力与导热热阻
B.
热辐射能力与对流热阻
C.
对流热阻与导热热阻
D.
导热热阻与对流热阻
【多选题】属于半合成抗生素的有
A.
青霉素钠
B.
氨苄西林钠
C.
头饱噻吩钠
D.
氯霉素
E.
土霉素
【单选题】香烟中有许多有害物质,长期吸烟可能导致气管炎、肺癌、口腔癌、冠心病等。
A.
Y
B.
N
C.
-
D.
-
【单选题】Windows 的 MessageBox 函数代码保存于 USER32.DLL 文件中, MASM 汇编语言程序要调用时,应在程序开始使用下面的语句:
A.
includelib user32.dll
B.
include user32.dll
C.
include user32.lib
D.
includelib user32.lib
【多选题】属于半合成抗生素的有
A.
氨苄西林钠
B.
头孢噻吩钠
C.
氯霉素
D.
土霉素
E.
青霉素钠
【多选题】属于半合成抗生素的药物有
A.
氨苄西林
B.
氯霉素
C.
土霉素
D.
盐酸米诺环素
E.
多西环素
【多选题】属于半合成抗生素的药物有
A.
氨苄青霉素
B.
氯霉素
C.
土霉素
D.
盐酸米诺环素
E.
阿卡米星
【简答题】根据下列数值讨论在标准状态下,Fe 3+ 及 与I 2 ,I - 的反应倾向,计算反应的平衡常数。 已知: , 。
【简答题】网络“狂欢”
【多选题】属于半合成抗生素的药物有
A.
氯霉素
B.
氨苄青霉素
C.
土霉素
D.
阿卡米星
E.
盐酸米诺环素
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