[单项选择] Let’’s now briefly consider a generally honored but sometimes maligned (被诋毁的)type of scientist, the theorist. Theorists are considered separately, since they are the rarest, most fascinating, and most important of the species scientists. Their motivational system most often is that of the Player, although occasionally it is that of the Operator. Although theorists are often viewed as cold. rational, deliberate machine, they are generally almost the opposite of this popular picture. They are usually individuals of strong feelings who have the ego of actors and an irrational, almost mysterious attachment to particular views of their discipline. The appearance of cool deliberation is their public face. which often represents only their contempt for contact with the spectators. There are important occupational differences between theorists and other scientists. Theo risks set the framework within which others do their research. Those other than the theorists do the important wor
A. has strong feelings
B. has the ego of actors
C. is both cold and rational
D. is neither neurotic nor psychotic

[单项选择] Let’’s now briefly consider a generally honored but sometimes maligned (被诋毁的)type of scientist, the theorist. Theorists are considered separately, since they are the rarest, most fascinating, and most important of the species scientists. Their motivational system most often is that of the Player, although occasionally it is that of the Operator. Although theorists are often viewed as cold. rational, deliberate machine, they are generally almost the opposite of this popular picture. They are usually individuals of strong feelings who have the ego of actors and an irrational, almost mysterious attachment to particular views of their discipline. The appearance of cool deliberation is their public face. which often represents only their contempt for contact with the spectators. There are important occupational differences between theorists and other scientists. Theo risks set the framework within which others do their research. Those other than the theorists do the important wor
A. chiefly for changing the world
B. just for challenging the status quo
C. primarily for the benefits of humankind
D. mainly for playing the game of science

[单项选择]Let us now see how randomization is done when a collision occurs. After a ______, time is divided into discrete slots whose length is equal to the worst-case round-trip propagation time on the ether (2t). To accommodate the longest path allowed by Ethernet, the slot tome has been set t0 512 bit times, or 51.2μsec.A.datagram B.collision C.connection D.service

[单项选择]More people are now going to dentists’ offices, but nearly one half of the United States population will not see a dentist. Why They are scared. And, really, what experience is worse than seeing a traditional dentist You wait in silence, thumbing through old magazines, in a germ-free white waiting room in which no one ever speaks. All is silent until an assistant calls your name and leads you back to another white room, which is filled with machinery to frighten you still further.
At the Medical College of Georgia, dentists are taught principles of behavior and techniques of office design that should help reduce the patients’ anxiety and tension. Assistants and receptionists are taught to smile and speak to the patient. This helps create an environment of trust. Dentists themselves are being taught to communicate more fully with the patient. A phrase such as" you are doing fine" tells the patient that the dentist is appreciative of the patient’s unpleasant situation.
D
A. pleasant places in one’s memory
B. avoided red color because it is connected with blood and pain
C. decorated very well to attract more patients
D. required to paint white

[填空题]But now Tom is a good table tennis player． But now Tom plays table tennis______．

[单项选择]—Let me help you prepare dinner, Morn.
— （　） , but your homework hasn’t been done, you’d better finish it first.
A. That’s all right
B. You’re welcome
C. That’s very kind of you
D. I’d love to

[单项选择]

Now, let me first give you a brief introduction to the American poet, Emily Dickinson. Emily Dickinson was America’s best-known female poet and one of the foremost authors in American literature. Born in Amherst, Massachusetts, Dickinson was the middle child of a prominent lawyer and one-term United States congressional representative, Edward Dickinson, and his wife, Emily Norcross Dickinson. From 1840 to 1847 she attended the Amherst Academy, and from 1847 to 1848 she studied at the Mount Holyoke Female Seminary (now Mount Holyoke College) in South Hadley, a few trips to Boston for eye treatments in the early 1860s, Dickinson remained in Amherst, living in the same house on Main Street from 1855 until her death. During her lifetime, she published only about 10 of her nearly 2,000 poems, in newspapers, Civil War journals, and a poetry anthology. The first volume of Poems of Emily Dickinson was published in 1890, after Dickinson’s death.
Although few o
A. In 1848.
B. In the early 1850s.
C. In the late 1850s.
D. In the early 1860s.

[单项选择] One Good Reason to Let Smallpox Live 　　It’s now a fair bet that we will never see the total extinction (灭绝) of the smallpox (天花) virus. When smallpox was completely got rid of in the world, scientists wanted to　　(51)　　 the killer virus in the last two labs - one in the US and one in Russia. They asked: If smallpox has truly gone from the planet,　　(52)　　 point was therein keeping these reserves 　　in reality, of course, it was naive to　　(53)　　that everyone would let go of such a powerful potential weapon. Undoubtedly several nations still have 　　(54)　　 vials (小药瓶). And the last "official" stocks of live virus bred mistrust of the US and Russia,　　(55)　　 no obvious gain. 　　Now American researchers have　　(56)　　an animal model of the human disease, opening the　　(57)　　for tests on new treatments and vaccines (疫苗). So once again there’s a good reason to　　(58)　　the virus -just in　　(59)　　the disease puts in a reappearance. 　　How do we　　(60)　　with the mistru
A. difficult
B. clear
C. wrong
D. correct