It has always been the _____ of our government to encourage graduates to start their business.

A. plan               B. campaign         C. procedure             D. policy

With only about 1, 000 pandas left in the world, China is desperately trying to clone(克隆) the animal and save the endangered species(物种). That’s similar to what Texas A＆M University researchers have been undertaking(负责) for the past five years in a project called “Noah’s Ark”.

Noah’s Ark is aimed at collecting eggs, embryos(胚胎), semen and DNA of endangered animals and storing them in liquid nitrogen(氮). If certain species should become extinct, Dr. Duane Kraemer, a professor in Texas A＆M’S College of Veterinary Medicine, says there would be enough of the basic building blocks to reintroduce the species in the future.

It is estimated that as many as 2, 000 species of mammals, birds and reptiles will become extinct in over 100 years. The panda, native only to China, is in danger of becoming extinct in the next 25 years.

Chinese scientists said they grew an embryo introducing cells from a dead female panda into the egg cells of a Japanese white rabbit. They are now trying to implant the embryo into a host animal.

The entire procedure(过程) could take from three to five years to complete.

“The nuclear transfer(核子移植) of one species to another is not easy, and the lack of available(capable of being used) panda eggs could be a major problem,” Kraemer believes. “They will probably have to do several hundred transfers to result in one pregnancy(having a baby). It takes a long time and it’s difficult, but this could be groundbreaking science if it works. They are certainly not putting any live pandas at risk, so it is worth the effort,” adds Kraemer, who is one of the leaders of the Project at Texas A＆M, the first-ever attempt at cloning a dog.

“They are trying to do something that’s never been done, and this is very similar to our work in Noah’s Ark. We’re both trying to save animals that face extinction. I certainly appreciate their effort and there’s a lot we can learn from what they are attempting to do. It’s a research that is very much needed.”

The aim of “Noah’s Ark” project is to_______. 

A. make effort to clone the endangered pandas

B. save endangered animals from dying out

C. collect DNA of endangered animals to study

D. transfer the nuclear of one animal to another

According to Professor Kraemer, the major problem in cloning pandas would be the lack of _______. 

A. available panda eggs                             B. host animals

C. qualified researchers                             D. enough money

The best title for the passage may be _______. 

A. China’s Success in Pandas Cloning

B. The First Cloned Panda in the World

C. Exploring the Possibility to Clone Pandas

D. China — the Native Place of Pandas Forever

From the passage we know that _______. 

A. Kraemer and his team have succeeded in cloning a cat

B. scientists try to implant a panda’s egg into a tiger

C. Kraemer will work with Chinese scientists in clone researches

D. about two thousand of species will probably die out in about a century

Taking a math test can be pretty stressful. Even if you know the material, you can still get the problem wrong. Knowing how to go through your math test and check your work can save you from handing in a test full of mistakes that can be avoided.   1. 

Write it out

You can also check a math problem by writing everything out on paper.   2.  Writing out math problems reduces your chances of missing anything to the lowest possible level, which is a common cause of incorrect answers.

 3. 

Make sure your answers work by doing the opposite procedure of what your problem calls for, including the answer you got the first time around. In other words, you would use the opposite of this addition problem—subtraction (减法)—to determine whether or not your answer is the correct one.

Plugging in

You may find that a variable isn’t good enough or have a problem where you have to solve for a variable (变量).   4.  This is the only real way to assure yourself that the answer you’ve found is correct.

Check for a reasonable answer

  5.  For example, if you get an answer in the millions and you know it should be in the thousands, you’ve likely misplaced a point. Go back through the work on your paper to make sure all of your formulas (公式) and calculations are correct. If everything looks okay, do the problem again and compare the result of the second try to what you’ve got on the first try.

A．Do the opposite

B．Correct the answers

C．Therefore you’ll improve your grades, as well as your math skills.

D．Plug the variable in the equation (方程) to check it out.

E. If the result of a problem seems to make no sense, it indicates that the answer is incorrect.

F. It also helps you to figure out everything after you have already finished the test.

G. This helps you to know what information you have and what information you need to solve.

 

How to Order

Ordering from BooksFirst is easy and safe.

Selecting Your Books

When you have found a book you would like to order, just click on Add to Basket and it will be added to your shopping basket. To make it easy to keep track of the books you’ve selected, My Shopping Basket will display your choices wherever you are on the site. When you’re ready to place your order, select View Basket.

View Basket

This is where you select the postal destination for your order, indicate whether you would like Next Day Delivery in the UK and choose gift-wrapping. You can also amend (修改) the contents of your basket by making any changes and then selecting Update Basket.

Overseas customers ordering three or more books can also request reduced airmail charges here. When you’re happy with the contents of your shopping basket, go to the Secure Checkout.

The Order Form

After you’ve completed the order form, you will receive an on-screen acknowledgment. This will be followed by an email confirming the details of your order.

We will then inform you when your order has been sent. If this is your first order, we will also inform you of your personal BooksFirst account number.

Your First Order

We’ll send you a personal account number after you have placed your first order. For following orders all you need to do is enter your personal account number and email address.

Returning Customers

If you have ordered from us before, online, by mail or telephone, you will have already owned a personal account number. You then only need to complete the full order form. Using your account number allows us to find your details from our records (they are not accessible online).

However, you do not need your BooksFirst personal account number to place an order—simply present all the required details on the order form. If you don’t have a note of your account number just Contact us so that we can supply it to you.

1.We can probably read this advertisement ______.

A．in a newspaper     B．in a magazine       C．on the Internet     D．on TV

2.Yours choices will be displayed in order to ______.

A．To make it easy to keep track of the books.

B．To make sure you’ve selected a book.

C．To make an advertisement.

D．To show this is the postal destination.

3.Which of the following is true?

A．You must put what you choose in a basket as you do in a supermarket.

B．You can find your Shopping Basket nowhere but in View Basket.

C．You will get your personal account number the third time you order..

D．You can get an account number after you place an order online

4.The purpose of this advertisement is______.

A．to promote the sale of books

B．to show the procedure of ordering books online

C．to help readers apply for account numbers

D．to supply account numbers to readers

 

Before the early 1960’s people interested in the differing roles of the left and right hemispheres(半球) of the brain depended almost entirely on facts drawn from animal research, form studies of patients with one-sided brain damage. But it was possible to find out which brain hemisphere was most involved in speech and other functions in normal people by having them listen to two different words coming to the two ears at the same time. This became known as the “dichotic listening” procedure. When several word pairs are given in a row, people are unable to report them all, and most right-handers prefer to report, and report more correctly, words given to their right ears. This seems to be related to the fact that signals from the right ear, although sent to both hemispheres, are better sent to the left hemisphere which controls speech. People who have speech represented(回忆) in the right hemisphere, a very unusual occurrence even in left-handed people, more correctly report what their left ears hear.

In contrast to the right-ear advantage for speech, there is generally a left-ear advantage for another type of auditory(听觉的) signal: music. When right-handed people listen to melodic patterns they report them better from the left ear.

1.Which of the following would be the most proper title for the passage?

A．An Introduction to Speech Damage in Patients with Brain Damage.

B．An Investigation into the Role of the Brain’s Hemispheres.

C．An Analysis of Left and Right-handed People.

D．An Examination of “Dichotic Listening”.

2.The “dichotic listening” procedure could best be described as hearing _______.

A．two different words in the same ear twice

B．the same word twice in the same ear

C．two different words in different ears

D．two different words twice in two ears

3.according to the passage, right-handed people normally _______.

A．have better hearing in their both ears

B．have little difficulty in reporting words given to their right ears

C．are unable to report word pairs given to their left ears

D．correctly report word pairs given in a row

4.according to the passage, music is best appreciated when heard by _______.

A．the left ear of right-handers

B．people with a left-ear advantage

C．left-handers in their right ears

D．right-handed people who understand melodic patterns