问题 单项选择题

如果数据环境设计器中有多个关联的表,若要删除某个表,则与之关联的表与被删除表之间的关系将( )。

A.不再存在

B.可能存在

C.仍然存在

D.以上都对

答案

参考答案:A

解析: 数据环境中能够包含与表单有联系的表和视图以及它们之间的关系。当表从数据环境中移去时,与这个表有关的所有关联也将随之消失。

单项选择题
阅读理解

A NATIONWIDE BESTSELLER

It’s likely that everything you learned about America’s ancient history is wrong.

The new book,1491, completely changes our understanding of the America before the arrival of Columbus in 1492.

DID YOU KNOW?

When Columbus landed there were probably more people in the Americas than there were in Europe.

The peoples of North America had such healthy life-styles that as late as the 19th century they continued to be the tallest people on earth.

Facts have shown that the Americas were populated as long as 33,000 years ago. 4,000 years ago Mesoamerican farmers developed corn in a feat (技艺) of genetic engineering that still isn’t completely understood.

COMMENTS ON 1491

“In the tradition of Jared Diamond & John MePhee, a totally new view of pre-Columbian America”.

-Richard Rhodes

“Attractively written and really absorbing, Charles C.Mann has produced a book that’s part detective story, part epic(史诗) and part tragedy(悲剧). He has taken on a vast topic: thousands of years, two huge continents, and cultures.”

-Charles Matthews,San Jese Mercary News

“Powerful and challenging”

-Alan Taylor,Washingto post

“A pleasure to read as well as a wonderful education”

-Howard Zinn

小题1:On the whole,1491 is a book mainly about America’s________.

A.life-styles

B.population

C.history

D.agriculture小题2:Which of the following is NOT TRUE about the comments on the book 1491?

A.It is interesting and instructive.

B.It is attractive and culturally related.

C.It is challenging and revolutionary.

D.It is humorous and persuasive小题3:From this passage, we can learn_________.

A.people settled in the America a little earlier than 1492

B.North Americans were the tallest in the 18th century in the world

C.Mesoamencan farmers knew genetic engineering 5,000 years ago

D.the population in the Americas was smaller than that in Europe in 1492