下面关于函数依赖的叙述中,错误的是A.只有II B.只有III C.I和IIIX D

题型:单项选择题

问题:

下面关于函数依赖的叙述中,错误的是

A.只有II

B.只有III

C.I和IIIX

D.II和IV

考点:计算机等级考试数据库技术计算机三级(数据库技术)35
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下列哪项不是介水传染病的流行特点

A.一次污染,暴发流行

B.病例集中在最短潜伏期以前

C.病例分布与供水的范围一致

D.病例集中在最短潜伏期以后

E.污染源控制后流行很快得到控制

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下列不属于按客户行为分类描述的是()。

A、是指根据零售客户所销卷烟的品牌构成、经营规模等进行细分;

B、根据实际需求在有新品牌卷烟推出的时候,按零售客户对新品营销支持程度对客户进行划分,以识别那些对新品接受度高的顾客;

C、按照零售客户对公司其他政策导向的配合度进行细分;

D、在指定系列忠诚度评价指标后,按忠诚度大小进行分类。

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Since long ago,greeting cards have been considered a time-saver.More than 150 years ago,a busy Englishman,Sir Henry,asked a friend to design a card so that he didn't have to labour to write holiday letters to his friends at the end of the year.Those paper cards are now the tradition.

But time,like sunlight,is still in short supply for December.That's why the Internet is ready to make a change in holiday greeting customs.Already,those,who are always busy,like sending video greetings by e-mail.So,don't be surprised to find a lively card in your electronic mail box at the end of the year or at any time you should have one.

A recent survey by the Shared Greetings Company found 50 percent of all the Internet users will send online cards especially during the holiday seasons.“That is a lot easier,and it is lively,”said Carol,a New Yorker,who had stopped at the Shared Greetings Company demonstration() online.With her children's help,she sent her first e-card before Thanksgiving Day.“It was the first time I had done something like this;it's quite enjoyable,”she said.

“I will send online Christmas cards to my friends,”said Marcos,a 22-year-old student.“It costs so little and you can even send numbers of greetings at a time.”But he added “the e-card also has its limits,and I don't think it is ready to replace the paper card for the more formal or traditional occasions.For some people,I would rather buy paper cards and mail them traditionally.I believe it is more personal and respectful in that way,”he said.

Well,for those who are very busy but still prefer to do a lot of greetings to different receivers in the holiday season,the Internet may have another way.“Now you can use the Net to decide and send as many as 50 beautiful cards,which allows the buyer to choose the inside saying,as well as the ink colour and typeface,only costing about 30 minutes,”said Julie,vice-president of marketing for an electronic card company-Hallmark Company.“And if you are in less of a hurry,you can spend another 30 minutes sitting in your home or office to create a photo card,showing off your kids,your pets or even your new house-anything as your favorite design for your relatives and friends.”

小题1:How can we understand “But time,like sunlight,is still in short supply for December”in Paragraph 2?

A.December cannot supply enough time for people because the sunlight in this month is short.

B.People are always busy at the end of the year,so time is precious like the sunlight in winter.

C.Time is short at the end of the year,like the sunlight in December.

D.Time passes quickly like the sunlight in winter as December comes.小题2:According to the 22-year-old student,he would probably mail e-cards to everyone except_________.

A.the members of his family

B.his girlfriend

C.the teachers who have taught him

D.his schoolmates小题3:If you are quite busy,but having many greetings to send,which of the following is your best choice?

A.Ordering a lot of cards you like online and sending them from the post office.

B.Getting as many cards from your electronic mail box and mailing them on the Net.

C.Sitting and writing lots of beautiful cards at home and sending them just in a traditional way.

D.Choosing personalized cards in numbers and mailing them directly on the Net.

题型:单项选择题

光缆线路的防护接地装置和接地电阻维护技术指标测试周期是每隔()测试一次。

题型:单项选择题

像素图的图像分辨率是指:()

A.单位长度上的锚点数量

B.单位长度上的像素数量

C.单位长度上的路径数量

D.单位长度上的网点数量

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