单选题I would appreciate ______ it a secret.

单选题Differences in positions adopted by oxygen and hydrogen atoms account for variations in the crystalline structure of different forms of ice. A. are caused by B. explain C. derive from D. constitute

单选题3. We don't read books for amusement.

单选题She told her little brother ______ her hand tightly while they were crossing the busy street.

单选题Had he worked harder, he ______ the exams. A. must have got through B. would have got through C. would get through D. could get through

单选题The child was ______ for getting his shoes and socks wet.

单选题Euthanasia is clearly a deliberate and intentional aspect of a killing. Taking a human life, even with subtle rites and consent of the party involved is barbaric. No one can justly kill another human being. Just as it is wrong for a serial killer to murder, it is wrong for a physician to do so as well, no matter what the motive for doing so may be. Many thinkers, including almost all orthodox Catholics, believe that euthanasia is immoral. They oppose killing patients in any circumstances whatever. However, they think it is all right, in some special circumstances, to allow patients to die by withholding treatment. The American Medical Association's policy statement on mercy killing supports this traditional view. In my paper "Active and Passive Euthanasia" I argue, against the traditional view, that there is in fact no normal difference between killing and letting die--if one is permissible, then so is the other. Professor Sullivan does not dispute my argument; instead he dismisses it as irrelevant. The traditional doctrine, he says, does not appeal to or depend on the distinction between killing and letting die. Therefore, arguments against that distinction "leave the traditional position untouched." Is my argument really irrelevant? I don't see how it can be. As Sullivan himself points out, nearly everyone holds that it is sometimes meaningless to prolong the process of dying and that in those cases it is morally permissible to let a patient die even though a few more hours or days could be saved by procedures that would also increase the agonies of the dying. But if it is impossible to defend a general distinction between letting people die and acting to terminate their lives directly, then it would seem that active euthanasia also may be morally permissible. But traditionalists like professor Sullivan hold that active euthanasia--the direct killing of patients--is not morally permissible; so, if my argument is sound, their view must be mistaken. I can not agree, then, that my argument "leave the traditional position untouched." However, I shall not press this point. Instead I shall present some further arguments against the traditional position, concentrating on those elements of the position which professor Sullivan himself thinks most important. According to him, what is important is, first, that we should never intentionally terminate the life of a patient, either by action or omission, and second, that we may cease or omit treatment of a patient, knowing that this will result in death, only if the means of treatment involved are extraordinary.

单选题According to the airline industry statistics, almost 90% of airline accidents are survivable or partially survivable. But passengers can increase their chances of survival by learning and following certain tips. Experts say that you should read and listen to safety instructions before takeoff and ask questions if you have uncertainties. You should fasten your seat belt low on your hips as tightly as possible. Of course, you should also know how the release mechanism of your belt operates. During takeoffs and landings you are advised to keep your feet flat on the floor. Before takeoff you should locate the nearest exit and an alternative exit and count the rows of seats between you and the exits so that you can find them in the dark if necessary. In the event that you are forewarned of a possible accident, you should put your hands on your ankles and keep your head down until the plane comes to a complete stop. If smoke is present in the cabin, you should keep your head low and cover your face with napkins, towels, or clothing. If possible, wet these for added protection against smoke inhalation. To evacuate as quickly as possible, follow crew commands and do not take personal belongings with you. Do not jump on escape slides before they are fully inflated, and when you jump, do so with your arms and legs extended in front of you. When you get to the ground, you should move away from the plane as quickly as possible, and never smoke near the wreckage.

单选题Robots have been the stuff of science fiction for so long that it is surprisingly hard to see them as the stuff of management fact. It is time for management thinkers to catch up with science-fiction writers. Robots have been doing menial jobs on production lines since the 1960s. The world already has more than 1 million industrial robots. There is now an acceleration in the rates at which they are becoming both cleverer and cheaper: an explosive combination. Robots are learning to interact with the world around them. Their ability to see things is getting ever closer to that of humans, as is their capacity to ingest information and act on it. Tomorrow"s robots will increasingly take on delicate, complex tasks. And instead of being imprisoned in cages to stop them colliding with people and machines, they will be free to wander. Until now executives have largely ignored robots, regarding them as an engineering rather than a management problem. This cannot go on: robots are becoming too powerful and ubiquitous . Companies certainly need to rethink their human-resources policies—starting by questioning whether they should have departments devoted to purely human resources. The first issue is how to manage the robots themselves. An American writer, Isaac Asimov laid down the basic rule in 1942: no robot should harm a human. This rule has been reinforced by recent technological improvements: robots are now much more sensitive to their surroundings and can be instructed to avoid hitting people. A second question is how to manage the homo side of homo-robo relations. Workers have always worried that new technologies will take away their livelihoods, ever since the original Luddites" fears about mechanised looms. Now, the arrival of increasingly humanoid automatons in workplaces, in an era of high unemployment, is bound to provoke a reaction. Two principles—don"t let robots hurt or frighten people—are relatively simple. Robot scientists are tackling more complicated problems as robots become more sophisticated. They are keen to avoid hierarchies among rescue-robots (because the loss of the leader would render the rest redundant). They are keen to avoid duplication between robots and their human handlers. This suggests that the world could be on the verge of a great management revolution: making robots behave like humans rather than the 20th century"s preferred option, making humans behave like robots.

单选题Ms. Breen has been living in town for only one year, yet she seems to be ______ with everyone who comes to the store.

单选题The police chief ordered that parking ______ on Main Street during the rush hour.

单选题_______countries are now at risk of not achieving education for all on the basis of completion rates. 

单选题The CalPERS lawsuit indicates that ______.

单选题You may make good grades by studying only before examinations, but you will succeed eventually only by studying hard every day. A. in due course B. in the long run C. in the main D. in the first place

单选题Her parents expect ______a qualified doctor.

单选题This newspaper will not knowingly accept______for real estate which is in violation of the law.

单选题George loves his daughter, ______ he is strict with her. A. Even B. For C. Although D. Whether

单选题—I do want to fire him.—But you won't do it, ______?