Sex-influenced traits are, by definition, on the X or Y chromosome.

Every year, Americans throw away 50billion food and drink cans, 27billion glass bottles and jars, and 65billion can covers. More than 30%of our waste is packaging materials. Where does it all go？ Some 85%of our garbage is sent to a dump,or a landfill, where h can take from 100to 400years for things like cloth and aluminum 铝to decompose . Glass has been found in perfect condition after 4,000years in the earth! We are quickly running out of space. It’s time to learn the three R’s of the environment reduce, reuse,and recycle. 

Reducing the amount of waste you produce is the best way to help the environment. For example you can buy products that don’t have a lot of packaging. You can also look for things that are packed in materials that don’t require a lot of energy or resources to produce. Instead of buying something you’re not going to use very often, borrow it from someone you know. Save energy by turning off lights that you are 8not using. 

Instead of throwing things away,try to find ways to use them again! Bring cloth bags to the store with you instead of taking home new paper or plastic bags. You can use these bags again and again. Plastic containers and reusable lunch bags are great ways to take your lunch to school without creating waste. Use all writing paper on both sides. 

In some towns you can leave your recyclables in bins outside your homeland a truck will come and collect them regularly. Other towns have recycling centers where you can drop off the materials you’ve collected. Things like paper and plastic grocery bags, plastic and aluminum cans and bottles can often be brought to the grocery store for recycling. Whatever your system is,it’s important to remember to clean and sort your recyclables! 

32.What does the first paragraph tell us？

A.How much waste Americans produce annually

B.How many things Americans waste each year

C.How a landfill contains waste

D.How long glass can endure

Why are cloth bags recommended？ A.Because they require fewer resources for production 

B.Because they can be recycled many times 

C.Because they can be used repeatedly 

D.Because they require less energy for production 

What does the word decompose (Para.1) probably mean？ 

A.Recycle

B.Reduce

C.Produce

D.Decay

How many specific recycling systems are mentioned in the last paragraph？ A.1

B.2

C.3

D.4

A、Alkaline denaturation

B、Protease

C、Exonuclease

D、Heat

Educators today are more and more oftenheard to say that computer literacy is absolutely necessary forcollegestudents. Many even argue that each incoming freshman should have permanentaccess to his or her ownmicrocomputer. What advantages do computers offer thecollege students？

Any student who has used a word processorwill know one compelling reason to use a computer: to writepapers. Although notall students feel comfortable composing on a word processor, most ,findrevising and editingmuch easier on it. One can alter, insert, or delete just bypressing a few keys, thus eliminating the need to rewrite orre-type.Furthermore, since the revision process is less burdensome, students are morelikely to revise as often as isnecessary to end up with the best paperpossible. For these reasons, many freshman English cottrses require the useof aword processor.

Computers are also useful in the contextof language courses, where they are used to drill students in basicskills.Software programs reinforce ESL(English as a Second Language .instruction, aswell as instrnction in French, German, Spanish, and other languages. By usingthese programs on a regular basis, students can improvetheir proficiency in alanguage while proceeding at their own pace.

Science students take advantage ofcomputers in many ways. Using computer graphic capabilities, forexample, botanystudents can represent and analyze different plant growth patterns. Medicalstudents can learn tointerpret computerized images of internal body structures.Physics students can complete complex calculations farmore quickly than theycould without the use of computer.

Similarly, business and accountingstudents find that computer spreadsheet programs are all but indispensabletomany aspects of their work, while students pursuing careers in graphic arts,marketing, and public relations find thatknowledge of computer graphic isimportant Education majors learn to develop grading systems usingcomputers,while social science students use computers for analyzing andgraphically displacing their research results.

It is no wonder, then, that educatorssupport the purchase and use of microcomputers by students. A Versatile tool, the computer can help students learn.And that is, after all, the reason for going to college.

56、The word"literacy" (Line 1,Paragraph 1) means _________.

A.the ability to read andwrite

B.the ability to use

C.literature

D.the knowledge of language

57、The main purpose of thispassage is to _________.

A.persuade the educators toincrease computer use in their own classroom

B.analyze advantages anddisadvantages of computer use among college students

C.identify some of the waysthat computers benefit college students

D.describe how computers canbe used to teach foreign languages

58、According to the author, aword processor can be used to_________.

A.revise papers

B.retype papers

C.reduce the psychologicalburden of writing papers

D.improve the writing skillsof a student

59、In this passage, thewriter's argument is developed primarily through the use of_________.

A.cause-effect analysis

B.comparison andcontrast

C.induction

D.examples

60、According to the author,the reason for students to go to college is _________.

A.to learn something

B.to perfect themselves

C.to improve computerskills

D.to make the best use ofcomputers

To make it big, executives must possess four basic skills:

First, drive Business success takes an unusual amount of energy. A successful executive—almost 【C4】______ definition—is a striver. 【C5】______ will get tense when he is not striving.

Second, people sense Some say being able to judge people is more important 【C6】______ a high IQ, The skill can be instinctual, 【C7】______ in most cases it is painstakingly learned.

Third, communications ability. Different executives make themselves understood in different ways. Some transmit ideas best face to face; others are masters of the telephone call; still others are persuasive writers. One way 【C8】______ another, they all communicate clearly.

Fourth, calm 【C9】______ pressure No businessman will get very far 【C10】______ he chokes up.

【C1】______

A、interphase

B、prophase

C、metaphase

D、anaphase

E、telophase

A、fluorescent in situ hybridization

B、first induced strand hybrid

C、F1 insertion segment homolog

D、flanking insertion sequence hybrid

E、fluorescent insertion segment hybrid

A、assort randomly

B、can crossover and recombine

C、are allelic

D、co-segregate

E、will segregate independently