Scientific discoveries have changed man's life a great deal during the past century. First of all, they have greatly improved material well-being in several areas of life. In the field of medicine, cures for life threatening diseases have enabled people to live longer. In communication, the telephone and e-mail have made it possible for us to communicate with anyone in the world without leaving our homes or offices. Advances in transportation allow businessmen to fly across the ocean in the morning and return home the same evening. Space technology has put men on the moon. More efficient ways of using available resources, such as coal and solar power, have been explored. Scientific discoveries have also changed man's moral atmosphere. Ethical issues are raised by these discoveries. Should we keep a terminally ill person alive through drugs and machines or should we allow him to die in dignity? With advances in transportation had come the problem of pollution for nearly every major city in the world. If cities become uninhabitable, then such technical advances may come with too great a price to pay. Many people also question the wisdom of sending men to the moon when there are urgent problems that have not been solved on earth. During future years, increasing attention must be given to the moral as well as the practical applications of science. Scientific discoveries have improved man's life in several fields. Which of the following is not mentioned in the passage? A) medicine B) communication and transportation C) education D) space technology
C
There are no days when men and women couldn't associate with each other. When we are asked if boys and girls can associate with each other, most of us will say, "Yes, of course. Why not? " If we want to deal with the association between boys and girls properly, here are some tips for you to follow. 1)Keep a normal and healthy state of mind . Our schools and classes are made up of boys and girls. It is very natural for the boys and girls to contact each other and build up the friendship with the students of the other sex. Generally speaking, we should broaden the circle of the association. We should make as many friends as possible. We should have more friends of the other sex instead of one or two. We should contact the students in public, not in secret. 2)Contact students of the other sex warmly, generously and sincerely. Don't be too nervous or too shy in contact with a person of the other sex, because no one likes a person who is too shy to say a word. 3)Don't fall into the ditch of early love. The boys and the girls at adolescence are rich in feelings and full of imagination . They are easy to regard the friendship as a sign of love and fall in love with each other at an early age. In my opinion, early love is a green apple that can't be eaten. An apple won't taste sweet until it is fully ripe . Do keep out of early love. The main idea of the passage is to _ . A) tell students to keep away from early love B) give some advice on how to associate between boys and girls C) say contacts does good not only to boys but also to girls D) teach boys how to talk with girls
B
Q: Why Laughter Matters Although most people believe that laughter is one of the nature's great treatments for a whole range of mental and physical diseases, it is still a serious scientific subject that researchers are trying to figure out. "Laughter above all else is a social thing," says Baltimore neuroscientist, Robert Provine, who has studied laughter for decades. "All laughter groups laugh 'ha-ha-ha' basically the same way. Whether you speak Mandarin, French or English, everyone will understand laughter. There is a pattern generator in our brain that produces this sound." Laughing is our first way of communicating. Babies laugh long before they speak. No one teaches them how to laugh. They just do. People may laugh at a prank on April Fools' day. But surprisingly, only 10 to 15 percent of laughter is the result of someone making a joke. Laughter is mostly about social responses rather to a joke. Deaf people laugh without hearing and people on cell phones laugh without seeing, showing that laughter isn't dependent on single sense but on social interactions. And laughter is not just a people thing. Chimps tickle each other and even laugh when another chimp pretends to tickle them. Jaak Panksepp, a Bowling Green University Psychology professor, studies rats that laugh when he tickles them. It turns out rats love to be tickled--they return again and again to the hands of researchers tickling them. By studying rats, scientists can figure out what's going on in the brain during laughter. Northwestern University biomedical engineering professor, Jeffrey Burgdorf has found that laughter in rats produces a chemical that acts as an antidepressant . He thinks the same thing probably happens in humans, too. This would give doctors a new chemical target to develop drugs that can fight depression. Even so, laughter itself has not been proved to be the best medicine, experts said. Margaret Stuber, a professor at University of California, studied whether laugher helped patients. She found that distraction and mood... According to the passage, scientists studied rats in order to find _ . A) if they can laugh B) if they like laughing C) what laughter in rats produces D) how rats react while being tickled
A: C
Q: COURSE: History 101 "Instruction to American History" INSTRUCTOR: Dr. Jane Klammer OFFICE: 305 Marshall Hall OFFICE HOURS: 11:15 -12:30 M, W, F, (Monday Wednesday Friday) CLASS: 363 Marshall Hall 3:35 -5:00 T, Th (Tuesday Thursday) 10:00-11:00 M, W, F, other times by appointment TELEPHONE: 255---4786 TEXTBOOK: Green, Robert P. ,The American Tradition; Charles E. A History of the United States, Merrill Publishing Co. Columbus, Ohio 1984 which is available (that can be obtained) at the College Bookstore. COURSE REQUIREMENT: (something needed) mid-term exam: October 10 20% of the final grade final exam: December 10 40% of the final grade Term paper due: December 15 40% of the final grade Attendance is not required, but you are responsible for all the information given in the class lectures. In the lectures I will talk about the chapters in the textbook and other material that I choose to supplement the course. The exams will cover all the information. Therefore, I advise you to come to the classroom as much as possible. If you have to miss a class, be sure to get the class notes from another student. Your homework assignments are listed on the next page. You are supposed to read the chapter about which I will be lecturing before you come to class. This is to make sure that you understand as much as possible while taking notes in my lectures. Be prepared when you come to class. If there are any changes in the assigned homework, I will announce in class. The term paper is 40% of your final grade. It should not exceed15 pages. (Anyone thinking of majoring in history may write 25 pages). Before the mid-term exam you will choose the topic for your paper. Have a good term! According to the passage, which of the following is true? A) The textbook is written by Dr. Jane Klammer. B) If you have to miss a class, be sure to say sorry to Prof. Klammer. C) The student can buy "Introduction to American History" at the College Bookstore. D) Prof. Klammer advises her students to take notes in her class.
A: D