更多"The engineers have used special met"的相关试题:
[单项选择]Which of the following methods is used to increase the number of processes sharing the CPU （）
A. Interrupt
B. Scheduler
C. Working Set
D. Swapping
[单项选择]All of the following are methods commonly used to differentiate products from those of competitors except （）.
A. quality
B. design
C. tax policies
D. packaging
E. branding
[单项选择]Modern industrial methods have supplanted individual crafts, made blacksmiths, stone-carvers, coopers and cobblers virtually extinct.
A. that made
B. make
C. which making
D. making
[单项选择]Accordingly, a number of other methods have been employed（ ）.
A. Therefore
B. Afterwards
C. However
D. Furthermore
[填空题]What methods have been applied to U. S. agriculture nowadays
[单项选择]Electrical engineers have repeatedly demonstrated that the best solid-state amplifiers are indistinguishable from the best vacuum-tube amplifiers with respect to the characteristics commonly measured in evaluating the quality of an amplifier’s musical reproduction. Therefore, those music lovers who insist that recorded music sounds better when played with the best vacuum-tube amplifier than when played with the best solid-state amplifier must be imagining the difference in quality that they claim to bear.
Which one of the following, if true, most seriously weakens the argument
A. Many people cannot tell from listening to it whether a recording is being played with a very good solid-state amplifier or a very good vacuum-tube amplifier.
B. The range of variation with respect to the quality of musical reproduction is greater for vacuum-tube amplifiers than for solid-state amplifiers.
C. Some of the characteristics that are important in determining how music sounds to a listener cannot be measured.
D. Solid-state amplifiers are more compact, use less power, and generate less heat than vacuum-tube amplifiers that produce a comparable volume of sound.
E. (E) Some vacuum-tube amplifiers are clearly superior to some solid-state amplifiers with respect to the characteristics commonly measured in the laboratory to evaluate the quality of an amplifier’s musical reproduction.
[简答题]Statistics also means the methods used to calculate the summary numbers and to generalize from them.
[单项选择]
As long as we have been on earth, we have used
the sea around us. We take from the ocean and we give (41)
it.
We take fish from the ocean — millions of
kilograms of fish, every year, to (42) millions of people. We
even use (43) bones for fertilizer and meal.
We take (44) from the ocean. One way to get salt
(45) sea water in a shallow basin and leave it (46)
it evaporates. Along with salt, other minerals are left after
evaporation — iodine (碘), magnesium(镁), and bromine(溴), to (47)
a few.
Much gold and silver drift (48)
in the waters of the sea, too. But the sea does not (49)
them up by simple evaporation.
Other gifts from the
sea are pearls, sponges(海绵), and seaweed. Pearls become jewelry. (50)
sponges become cleaning aids. Seaweed becomes (51) of many
kinds —
A. in
B. up
C. to
D. for
[单项选择]The Chinese have used a method called acupuncture (针灸) to perform operations for about 4 000 years without putting the patient to sleep. This involves placing flexible needles into certain parts of the body. The needles are available in a number of stores in China and anyone may buy them.
To learn how to use the needles takes about one month of training. But to be skillful requires greater time. The person who performs the acupuncture knows how to put in the needles so the needles themselves are not painful. This person also knows where to place the needles so the patient feels no pain in the area where the operation is to be performed. A particular operation might require 25 or more needles placed in various parts of the body. But now this operation requires only 3 or 4 needles.
Today, the Chinese doctors are trying to learn more about acupuncture. They are trying to develop a convincing theory to explain how the needles work in preventing pain, or why a needle in the wrist,
A. the person performing the acupuncture knows a lot about the making of needles
B. an operation now needs fewer needles than in the past
C. acupuncture has existed in China for as long as 2 000 years
D. few patients prefer acupuncture to chemicals
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