单选题John has made up his mind not to go to the meeting.A. wantedB. promisedC. decidedD. agreed

单选题According to the latest report, the talks have collapsed.A. broken awayB. broken downC. broken inD. broken out

单选题The latest {{U}}census{{/U}} is encouraging. A.count B.statement C.agreement D.estimate

单选题The leading astronomers of the sixteenth and seventeenth centuries were Ufascinated/U by comets.

单选题Mr. Henley has accelerated his sale of shares over the past year.

单选题I had some difficulty in carrying out the plan.

单选题Many doctors are still general practitioners, but the {{U}}tendency{{/U}} is toward specialization in medicine.

单选题Smoking is not permitted in the office.

单选题Many cities have restricted smoking in public places.

单选题The decision to invade provoked storms of protest.A. ignoredB. organizedC. causedD. received

单选题Can we resume the meeting?

单选题 What Is the Coolest Gas in the Universe? What is the coldest air temperature ever recorded on the earth? Where was this low temperature recorded? The coldest recorded temperature on Earth was -91℃, which {{U}} {{U}} 1 {{/U}} {{/U}}in Antarctica in 1983. We encounter an interesting situation when we discuss temperatures in {{U}} {{U}} 2 {{/U}} {{/U}}temperatures in Earth orbit actually range from about 20℃ to 120℃. The temperature depends upon {{U}} {{U}} 3 {{/U}} {{/U}}you are in direct sunlight or shade. Obviously, -120℃ is colder than our body can safely endure. Thank NASA science for well-designed space {{U}} {{U}} 4 {{/U}} {{/U}}that protect astronauts from these temperature extremes. The space temperatures just discussed affect only our areal of the solar {{U}} {{U}} 5 {{/U}} {{/U}}. Obviously, it is hotter closer to the sun and colder as we travel away from the sun. Astronomers estimate temperatures at Pluto are about -210℃. How cold is the lowest estimated temperature in the entire universe? Again, it depends upon your {{U}} {{U}} 6 {{/U}} {{/U}}. We are taught it is supposedly {{U}} {{U}} 7 {{/U}} {{/U}}to have a temperature below absolute zero, which is -273℃, at which atoms do not move. Two scientists, whose names are Cornell and Wieman, have successfully cooled down a gas to a temperature barely {{U}} {{U}} 8 {{/U}} {{/U}}absolute zero. They won the Nobel Prize in Physics in 2001 for their work—not a discovery, in this case. Why is the two scientists' work so important to science? In the 1920s, Satyendra Nath Bose was studying an interesting {{U}} {{U}} 9 {{/U}} {{/U}}about special light particles we now call photons. Bose had trouble {{U}} {{U}} 10 {{/U}} {{/U}}other scientists to believe his theory, {{U}} {{U}} 11 {{/U}} {{/U}}he contacted Albert Einstein. Einstein's calculations helped him theorize that atoms {{U}} {{U}} 12 {{/U}} {{/U}}behave as Bose thought—but only at very cold temperatures. Scientists have also discovered that {{U}} {{U}} 13 {{/U}} {{/U}}atoms can help them make the world's atomic docks even more accurate. These clocks are so accurate today they would only lose one second {{U}} {{U}} 14 {{/U}} {{/U}}six million years! Such accuracy will help us travel in space because distance is velocity times time (d=v×t). With the long distances involved in space {{U}} {{U}} 15 {{/U}} {{/U}}, we need to know time as accurately as possible to get accurate distance.

单选题Look After Your Voice Often speakers at a meeting experience dry mouths and ask for a glass of water. You can solve the problem by activating the saliva in you mouth. First gently bite the edges of your tongue with your teeth. Or, press your entire tongue to the bottom of your mouth and hold it there until the saliva flow. Or you can imagine that you are slicing a big juicy lemon and sucking the juice. Before you begin your talk, be kind to your voice. Avoid milk or creamy drinks which coat your throat. Keen your throat wet by drinking a little sweetened warm tea or diluted fruit juice. If you sense that you are losing your voice, stop talking completely. Save your voice for your speech. You may feel foolish using paper to write notes, but the best thing you can do is to rest your voice. If you need to see a doctor, perhaps you can get some advice from a professional singer. In the meantime, do not even talk in a low voice. What about drinking alcohol to wet your throat? I advice you not to touch alcohol before speaking. The problem with alcohol is that one drink gives you a little confidence. The second drink gives you even more confidence. Finally you will feel all-powerful and you will feel you can do everything, but in fact your brain and your mouth do not work together properly. Save the alcohol until you finish speaking. Perhaps you want to accept the advice, but you may wonder if you can ever change the habits of a lifetime. Of course you can. Goethe, who lived before indoor skating rinks or swimming pools, said, "We learn to skate in the summer and swim in the winter." Take this message to heart and give yourself time to develop your new habits. If you are willing to change, you will soon be able to say that you will never forget these techniques because they became a part of your body.

单选题It is difficult to get young people to plan for their old age, which seems very distant to them.

单选题The council meeting terminated at 2 o"clock.

单选题Sleepwalking Not all sleep is the same every night. We experience some deep, quiet sleep and some active sleep, which is when dreams happen. You might think sleepwalking would happen during active sleep, but a person isn"t physically active during active sleep. Sleepwalking usually happens in the first few hours of sleep in the stage called slow-wave or deep sleep. Not all sleepwalkers actually walk. Some simply sit up or stand in bed or act like they"re awake when in fact, they"re asleep! Most, however, do get up and move around for a few seconds or for as long as half an hour. Sleepwalkers" eyes are open, but they don"t see the same way they do when they"re awake and often think they"re in different rooms of the house or different places altogether. Sleepwalkers tend to go back to bed on their own and they won"t remember it in the morning. Researchers estimate that about 15% of kids sleepwalk regularly. Sleepwalking may run in families (在家族中世代相传) and sometimes occurs when a person is sick, has a fever, is not getting enough sleep, or is stressed (紧张) . If sleepwalking occurs frequently, every night or so, it"s a good idea for your morn or dad to take you to see your doctor. But occasional sleepwalking generally isn"t something to worry about, although it may look funny or even scary (骇人的) for the people who see a sleepwalker in action. Although occasional sleepwalking isn"t a big deal, it"s important, of course, that the person is kept safe. Precautions (预防措) should be taken so the person is less likely to fall down, run into something, or walk out the front door while sleepwalking.

单选题Her life is becoming more diverse .

单选题It is highly unlikely that she will arrive today.A. veryB. probablyC. hardlyD. possibly

单选题My father always takes a {{U}}stroll{{/U}} for a while after supper. A. walk B. rest C. bath D. breath

单选题What kind of animal has a greater ability to regenerate a lost part?