题目内容

(31)到(35)题使用下列数据表。 “班级”表 班级号 班级名称 人数 11 计算机200801班 44 22 计算机200802班 50 33 计算机200803班 49 44 计算机200804班 46 55 计算机200805班 48 “学生”表 学号 姓名 性别 年龄 班级号 S1 李志明 男 18 33 S2 万力佳 女 19 11 S3 李风 女 20 22 S4 赵洪波 男 24 33 S5 刘鹏 男 22 44 S6 王晓晓 女 20 22 S7 张文静 女 22 11 S8 汪菁菁 女 19 44 S9 刘立洋 男 20 11 有下列SQL语句: SELECT 班级名称,姓名,性别,年龄 FROM 班级,学生; WHERE 班级.班级号=学生.班级号; AND 姓名 LIKE "李%"; ORDER BY 学生.班级号 该语句的含义是( )。

A. 检索学生表中姓“李”的学生记录,并根据“班级号”分组显示学生的班级名称、姓名、性别和年龄
B. 检索学生表中不是姓“李”的学生记录,并根据“班级号”分组显示学生的班级名称、姓名、性别和年龄
C. 检索学生表中姓“李”的学生记录,按“班级号”升序显示学生的班级名称、姓名、性别和年龄
D. 检索学生表中不是姓“李”的学生记录,按“班级号”升序显示学生的班级名称、姓名、性别和年龄

查看答案
更多问题

What is true according to the passage

A. Helen was born blind and deaf.
B. A sickness caused her to be blind and deaf.
C. Helen lost her sight and heating at the age of 19.

Section Ⅰ Use of English Directions: Read the following text. Choose the best word (s) for each numbered blank and mark A, B, C or D on ANSWER SHEET 1. (10 Points) Shyness is the cause of much unhappiness for a great many people. Shy people are (1) and serf-conscious; that is, they are (2) concerned with their own appearance and actions. (3) thoughts are (4) occurring in their minds: What kind of impression am I making It is obvious that such (5) feelings must affect people adversely. A person’s self-concept is (6) in the way he or she behaves, and the way a person behaves affects other people’s reactions. (7) , the way people think about themselves has a profound effect on all areas of their lives. Shy people, having low (8) , are likely to be passive and easily influenced by others. They need reassurance (9) they are doing "the fight thing". Shy people are very (10) to criticism; they feel it (11) their inferiority. A shy person may (12) to a compliment with a statement like this one: "You’re just saying that to make me feel good." It is clear that, (13) self-awareness is a healthy quality, overdoing it is harmful. Can shyness be completely (14) , or at least reduced Fortunately, people can overcome shyness with determined and patient effort in building self-confidence. Since shyness goes (15) with lack of serf-esteem, it is important for people to accept their weakness as well as their strengths. For example, most people would like to be "A" students in every subject. It is not fair for them to (16) themselves inferior because they have difficulty (17) some areas. People’s expectations of themselves must be (18) Each one of us is a unique, worthwhile individual. The better we understand ourselves, the easier it becomes to (19) our full potential. Let’s not allow shyness to block our chances for a rich and (20) life. Read the following text. Choose the best word (s) for each numbered blank and mark A, B, C or D on ANSWER SHEET 1.19()

A. disappeared
B. eliminated
C. deleted
D. deposited

Though explaining the entire human genetic blueprint is still a few years away, scientists have begun laying claim to the stretches of DNA whose codes they have succeeded in cracking. In recent years researchers have flooded the U: S. Patent and Trademark Office with applications for thousands of genes and gene fragments -- and they have stirred a lot of controversy in the process. The biggest problem with patenting genes is that while scientists have at least a general idea of what specific stretches of genetic coding do, often it’’s just that general. Investigators do sometimes succeed in isolating a single, crisp gene with a single known function. Often, however, researchers trying to map genes set no further than marking off fragmentary stretches of DNA that may be thousands of bases in length. These so-called expressed sequence tags may have real genetic information embedded in them, but determining where those fragments are and what their structure is takes more digging. Geneticists have lately been filing patent applications for these ESTs anyway. "I would guess that in many cases the scientists didn’’t even ex amine all the material," says Bruce Lehman, commissioner of the Patent and Trademark Office. Not only can such filings be careless genetics, they can also be bad business. EST applications may lead to so-called submarine patents, claims that are made today and then vanish, only to reappear when some unsuspecting scientist finds something useful to do with genes hidden in the patent. More troubling is an economic issue. If the entire genetic schematic is preemptively(抢先) owned by the research teams studying it now, where is the incentive for independent scientists -- often sources of great innovation -- to work on it later Licensing costs, warns Jeffrey Kahn, director of the University of Minnesota’’s Center for Bioethics, could hold medical progress hostage. Patenting supporters insist that an equally persuasive argument could be made that the large genome-mapping groups need patent protection to make their work worthwhile to them. Stickier than the economic question is the ethical one. Most of us shrink from the idea of anyone’’s owning the rights to any part of the human form. Besides, if the first anatomist(解剖学家)to spot, say, the pancreas(胰腺)was not granted title to it, why should modern genome mapping(其因组图的) scientist be able to claim even a single gene That kind of argument is grounded not in law but in the very idea of what it means to be human – an issue that even the highest federal court is not likely to settle. Laying claim to DNA stretches can be careless genetics because ______.

A. those who patent gene fragments are not qualified geneticists
B. the same gene fragments are often patented by different scientists
C. geneticists have no idea what they are going to do with patented genes
D. some of the gene fragments patented contain no real genetic information

What axe they talking about

A. Very often.
B. Seldom.
C. Once a week.

答案查题题库