Oracle数据库管理系统权限分为数据库系统权限和数据库______权限。

阅读理解。

     Dr. Glenn Tisman, a cancer specialist, knew his young neighbor, Ray Bateman, had an unusual mind.

But he had no idea at the time that 12-year-old Ray had the ability to become his partner in cancer

research.

     Ray' s parents remembered that at age four, Ray surprised them by fixing a broken vacuum cleaner (吸

尘器). When he was ten, he speedily constructed the family color television from a kit.Later, he

succeeded in assembling (组装) a complex stereo system after two experts had failed to do the job.

     When Ray was ten, he convinced his parents to buy him a computer.In a short time, Ray was able to

do amazing things with the computer.Ray shared his enthusiasm for computers with Dr. Tisman, who

used a computer for his research. The two discussed computers and medicine frequently.Amazingly, Ray

understood the biology and chemistry related to Dr. Tisman's medical research without any previous

instruction.

     Ray then worked with Dr. Tisman after school.He helped conduct research with the equipment and

kept it in working order.The purpose of the research was to test the effectiveness of mixing an old cancer

drug with certain vitamins.Ray analyzed patient test results by computer, while Dr. Tisman handled all

patient contact.Together, they came up with solid research that helped advance cancer treatment.

     In 1988, 14-year-old Ray went with Dr. Tisman to a meeting of the American Federation for Clinical

Research (AFCR) , where Ray presented their initial research findings.Using terminology (术语) beyond

the grasp of most kids of his age, Ray told the scientists how the new drug mixture caused fewer and

milder side effects for cancer patients.

     A year later, Ray returned to the meeting to update the findings of his and Dr. Tisman' s research. By

then, he had become well-known for his devotion to finding cures for sick patients.Stories about him

appeared in hundreds of newspapers around the world.He appeared on television newscasts and talk

shows.

     Ray continued to spend most free hours working with Dr. Tisman.The two began studying the effects

of vitamins on babies inside the womb.However, Ray' s main interest remained cancer treatment, and he

continues his research today.

1. According to the passage, Ray______.

A. is a boy of many gifts

B. is very helpful to his parents

C. learned fast under Dr. Tisman' s instruction

D. stopped working with Dr. Tisman after his success

2. What do we know about Dr. Tisman?

A. He succeeded in finding cures for cancer.

B. He made a new discovery in cancer treatment.

C. He convinced Ray to become a partner of him.

D. He taught Ray knowledge related to his research.

3. What made Ray first known to the medical world?

A. His presentation at AFCR.

B. His great skills in computer.

C. His devotion to cancer research.

D. His appearance on television newscasts.

4. Dr. Tisman's research is aimed at ______.

A. providing different cancer treatments

B. proving the effects of vitamins on babies

C. finding the side effects of a cancer drug

D. testing the effectiveness of a new drug mixture

阅读理解。

      At one time, computers were expected largely to remove the need for paper copies of

documents because they could be stored electronically. But for all the texts that are written,

stored and sent electronically, a lot of them are still ending up on paper.

      It is difficult to measure the quantity of paper used as a result of use of Internet-connected

computers, although just about anyone who works in an office can tell you that when e-mail is

introduced, the printers start working overtime. "I feel in my bones this revolution is causing

more trees to be cut down," says Ted Smith of the Earth Village Organization.

      Perhaps the best sign of how computer and Internet use pushes up demand for paper

comes from the high-tech industry itself, which sees printing as one of its most promising new

markets. Several Internet companies have been set up to help small businesses print quality

documents from a computer. Earlier this week Hewlett-Packard Co. announced a plan to

develop new technologies that will enable people to print even more so they can get a hard

copy of a business document, a medical record or just a one-line e-mail, even if they are

nowhere near a computer. As the company sees it, the more use of the Internet the greater

demand for printers.

     Does all this mean environmental concerns have been forgotten? Some activists suggest

people have been led to believe that a lot of dangers to the environment have gone away.

"I guess people believe that the problem is taken care of, because of recycling," said Kelly

Quirke, director of the Rainforest Action Network in San Francisco. Yet Quirke is hopeful

that high-tech may also prove helpful. He says printers that print on both sides are growing

in popularity. The action group has also found acceptable paper made from materials other

than wood, such as agricultural waste.

1．The growing demand for paper in recent years is largely due to ____.

A.the rapid development of small businesses  

B. the opening up of new markets

C. the printing of high quality copies          

D. the increased use of the Internet

2.  Environmentalists believe one possible way of dealing with the paper situation is ____.

A.to encourage printing more quality documents

B.to develop new printers using recycled paper

C.to find new materials for making paper

D.to plant more fast-growing trees

3．Hewlett-Packard Co. has decided to develop new technologies because ____.

A.people are concerned about the environment

B.printers in many offices are working overtime

C.small companies need more hard copies

D.they see a growing market for printers

4．What would be the best title for the text?

A.Computers and Printers                

B. E-mail and the Business World

C. Internet Revolution and Environment      

D. Modern Technology and New Markets

不是由于被保险人的故意，未将有关重要情况如实告知保险人的，（）。

A.保险人有权解除合同，但应退还保费。合同解除前发生损失的，保险人不负赔偿责任。

B.保险人有权解除合同，并不退还保费。合同解除前发生保险事故造成的损失，保险人应当负赔偿责任；但是，未如实告知的重要情况对保险事故的发生有影响的除外。

C.保险人有权解除合同或相应增加保费。保险人解除合同的，对于合同解除前发生保险事故造成的损失，保险人应当负赔偿责任；但是，未如实告知的重要情况对保险事故的发生有影响的除外。

D.保险人有权解除合同，并不退还保费。合同解除前发生损失的，保险人不负赔偿责任。

球磨机的工作原理，进料和出料粒径。

有关Hb的正确描述是（）

A.HbA由α₂γ₂珠蛋白肽链组成

B.HbA₂由α₂δ₂珠蛋白肽链组成

C.HbF由α₂β₂珠蛋白肽链组成

D.正常成人的HbA占70%

E.新生儿和婴儿的HbF含量显著低于成人