The most advanced () are the microprocessors, which control everything from computers and cellular phones to digital microwave ovens:

What accounts for the huge loss of jobs in America? A: The large flow of migrant workers. B: Using microprocessors excessively. C: Shifting production to other countries. D: The breakdown of the financial system.

The development of ___ led to the fully automatic ARPA systems installed on commercial ships. A: Sea Talk B: powerful microprocessors and mega memory capacity C: chart plotte D: small-scale chart

What does superscalar technique mean? A: The execution unit of instructions in a microprocessor is independent and works in parallel B: The microprocessor has multiple pipelines C: The integrated microprocessor chip has multiple logical CPUs inside D: A computer system has multiple independent microprocessors

Complete the following expressions or sentences by using the Target Words listed below. Change the form if necessary. alternative fabrication mechanical automatic inspection prototype cycle load remote defective massive share drop-ship material sufficient 1. The transmission is usually the hottest component and during the ________, it probably has a lot of stress. 2. No one likes ________ goods with obvious quality problems.. 3. The black hole could help scientists better understand how ________ stars explode, which ones leave behind black holes or neutron stars, and the number of black holes in our galaxy and others. 4. They products from the suppliers direct to the business customers. 5. The theory of ________control can be applied in many fields, such as factory automation system, airport automation system, etc. 6. What might happen then if you need to upload or download data between your workstation and the ________ host? 7. In recents years the selection of engineering ________ has become more and more importatnt, and the desire for weight reduction or energy savings may dictate the use of different materials 8. Many students choose the mahor of ________ engineering which needs students to learn about solid and fluid mechanics, thermodynamics, heat transfer, control, instrumentation, design, and manufacturing to understand mechanical systems. 9. The new design greatly increased the market ________ of their products. 10. If the ________ succeeds in flying through the night then the design of its successor will be finalized. 11. The tracing capabilities that are implemented are rather rudimentary (简陋的), but will be ________ for our purposes. 12. He said there was no ________ for him but to maintain order under any circumstances. 13. The microprocessors control the ________ and uploading equipment. 14. The application of new technologies and equipment shortened the development ________ of new products. 15. Controlled experiments can be performed, and statistical measures of the results can be made to determine the performance of a method of ________ relative to the parts to be inspected.

Modern technology may not haveimproved the world all that much but it certainly has made life noisier. Unruffledmotorcycles, blaring car alarms, and roving boom boxes come first, second, andthird on my list of most obnoxious noise offenders, but everyone could come upwith his own version of aural hell – if he could just find a quiet spot toponder the matter. Yet what technology has done, othertechnology is now starting to undo, using computer power, to zap thoseear-splitting noises into silence. Previously silence-seekers had littlerecourse except to stay inside, close the windows, and plug their ears.Remedies like these are quaintly termed “passive” systems, because they placephysical barriers against the unwanted sound. Now computer technology isproducing a far more effective “active” system, which doesn’t just contain,deflect, or mask the noise, but annihilates it electronically. The system works by countering theoffending noise with “anti-noise”, a somewhat sinister-sounding term that callsto mind antimatter, black holes, and other Popular Science mindbenders but thatactually refers to something quite simple. Just as a wave on a pond isflattened when it merges with a trough that is its exact opposite (or mirrorimage), so can a sound wave be negated by meeting its opposite. This general theory of soundcancellation has been around since the 1930s. In the fifties and sixties itmade for a kind of magic trick among laboratory acousticians playing aroundwith the first clunky mainframe computers. The advent of low-cost high-powermicroprocessors has made active noise-cancellation systems a commercialpossibility, and a handful of small electronics firms in the United States and abroad are bringing the first ones onto the silence market. Silence buffs might be hoping that the noise-canceling apparatus will takethe shape of the 44 Magnum wielded by Dirty Harry, but in fact active soundcontrol is not quite that active. The system might more properly be describedas reactive, in that it responds to sound waves already headed toward humanears. In the configuration that is usual for such systems microphones detectthe noise signal and send it to the system’s microprocessor, which almostinstantly models it and creates its inverse for loudspeakers to fire at theoriginal. Because the two sounds occupy the same range of frequencies andtones, the inverse sounds exactly like the noise it is to eliminate, theanti-noise canceling Beethoven’s Fifth Symphony is heard as Beethoven’s Fifth.The only difference is that every positive pressure produced on the air by theorchestra is matched by a negative pressure produced by the computer, and everynegative pressure is matched by a positive, thereby silencing the sound. The systemis most effective as a kind of muffler, in which microphones, micro-processor,and loudspeaker are all in a unit encasing the device that produces the sound,stifling it at its source. But it can work as a headset, too, negating thesound at the last moment before it disturbs one’s peace of mind. 1. The writer holds that( ). A. modern technology has disturbed thequiet life of the people B. moderntechnology has made people indifferent to noise pollution C. moderntechnology has made the present world quieter than before D.modern technology has failed to solve the problem of noise pollution 2. According to the passage,an active noise-cancellation system ( ). A. contains noise rather than negates it B. eliminates noise rather than muffles it C. deflects noise rather than baffles it D. holds noise back rather than stifles it 3. In paragraph 5 the word “buffs”means ( ). A. settlers B.enthusiasts C. buyers D. manufacturers 4. Which of the followingstatements is NOT true according to the passage? ( ) A.In the past, people sometimes plugged their ears to fight against the offendingnoise. B. An active noise-cancellation systemfollows the principle of a wave being flattened by meeting its exact opposite. C. The first active noise-cancellationsystem was made in the 1930s. D. Active noise-cancellation systems are nowavailable on the market. 5. Activenoise-cancellation systems require ( ). A. microphones B.microprocessors C.loudspeakers D. all of theabove

Whichtwowordsareclosestinmeaning?<br/><b>cycle</b><b>，</b><b>hawk</b><b>，</b><b>convey</b><b>，</b><b>extort</b><b>，</b><b>peddle</b><b>，</b><b>summon</b>

设A{a,b}，则P(A)×A = (   )。 A: A B: P（A） C: {<Φ,a>,<Φ,b>,<{a},a>,<{a},b>,<{b},a>,<{b},b>,<A,a>,<A,b>} D: {<a,,Φ,>,<b,,Φ,>,<a,{a}>,<b,{a}>,<a,{b}>,<b,{b}>,<a,A>,<b,A>}

以下哪段代码可以将A,B的值互换（） A: A=A^B; B=A^B;A=A^B B: A= A^B;A=A^B;B=A^B C: B= A^B; B=A^B; A=A^B D: B=A^B; A= A^B; A= A^B

若集合A={a，b}，B={ a，b，{ a，b }}，则（）。 A: A⊆B，且A∈B B: A∈B，且B⊆A C: A⊈B，且A∉B D: A∉B，且A⊈B