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The earth ____ around the sun.
A、revolved
B、revolves
C、is revolved
D、was revolved
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There are many stories and films about "Men from Mars" ___ Earth.
A、attackB、attackingC、attacksD、having attacked
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Wilfred’s remarks ______ me in my opinion that he was an honorable young man.()
A. confirmedB. contributedC. revolvedD. dismissed
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The direction of prevailing winds in the Northern hemisphere is caused by the ______．A.Magnetic field at the North PoleB.Gulf StreamC.Earth's rotationD.Arctic cold fronts
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How much on average is the European Tissue business worth a month?__________A.Around 8.5 billion euros
B.About 10 million dollars
C.About 708 million euros
D.Around 833 billion dollars
考题
The personal computer was a revolution in information technology that spawned a $50 billion hardware business with another $30 billion in software and peripherals (e.g. mouse keyboard printer etc. ) by 199. During its short 15 years the industry evolved through three successive periods. During its first 5 to 6 years it was characterized by explosive growth and multiple small competitors vying for a piece of the market. From 1981 to 1985 the industry became a battle for standards and retail shelf space. The third eras was one of increasing fragmentation. From 1986 through 1991-1992 new manufacturers from around the world granted from the industry leaders as new channels of distribution emerged and product innovation as well as revenue growth slowed
During the early years of the industry venture capital in the U.S. encouraged the entry of new firms that offered products in every conceivable shape and size. By 1980 new entrants flooded the market prompting distinct standards and unique technical features. Almost every firm had a different configuration of hardware and software. The first PC had relatively little speed or memory. However even these earl computers allowed managers to perform tasks that were very time consuming.
When did the PC industry start?A. Around 1981
B. Around 1966
C. Around 1976
D. Around 1992
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