What are three factors used to determine the amount of bandwidth that is required for a single VoIP call? ()
Questions 26 to 30 are based on the following passage. Exercise is one of the few factors with a positive role in long-term maintenance of body weight. Unfortunately, that message has not gotten through to the average American, who would rather try switching to “light” beer and low-calorie bread than increase physical exertion. The Centers for Disease Control, for example, found that fewer than one-fourth of overweight adults who were trying to shed pounds said they were combining exercise with their diet. In rejecting exercise, some people may be discouraged too much by caloric-expenditure charts: for example, one would have to briskly walk three miles just to work off the 275 calories in one delicious Danish pastry (小甜饼). Even exercise professionals concede half a point here. “Exercise by itself is a very tough way to lose weight,” says York Onnen, program director of the President’s Council on Physical Fitness and Sports. Still, exercise’s supporting role in weight reduction is vital. A study at the Boston University Medical Center of overweight police officers and other public employees confirmed that those who dieted without exercise regained almost all their old weight, while those who worked exercise into their daily routine maintained their new weight. If you have been sedentary (极少活动的) and decide to start walking one mile a day, the added exercise could burn an extra 100 calories daily. In a year’s time, assuming no increase in food intake, you could lose ten pounds. By increasing the distance of your walks gradually and making other dietary adjustments, you may lose even more weight. What is said about the average American in the passage? ()
Which of the following environmental factors are MOST important to monitor in order to protectcomputer equipment?()
In mid-ocean,the characteristics of a wave are determined by three factors. What is NOT one of these factors?().
The two factors which make underwater hull repair difficult are accessibility and the().
The Rules state that certain factors are to be taken into account when determining safe speed. One of the factors is the().
Which of the listed factors will indicate the most about the ability of a fuel to ignite in a diesel engine?()
What three in combination are factors that can cause four-wave mixing in fiber-optic cables? ()(Choose three.)
According to the passage, which of the following factors might spoil the tourists’ fun at Mediterranean resorts and beaches?
Which of the following factors tends to increase scale formation on the saltwater side of a heat exchanger used in a diesel engine cooling water system?()