更多"This machine, ______ for many years"的相关试题:
[单项选择]Only after many years of hard work ______ that money alone does not lead to happiness and success.
A. I did realize
B. had I realized
C. did I realize
D. I had realized
[单项选择]
A computer is a machine designed to perform work mathematically and to store and select in formation that has been fed into it. It is run by either mechanical or electronic means. These machines can do a great deal of complicated work in a very shout time. a large computer, for example, can add or subtract nine thousand times a second, or divide five hundred times a second. It’s percentage of error is about one in a billion digits(数字). It has been estimated that human beings making calculations average about one mistake per two hundred digits.
The heart of an electronic computer lies in its vacuum tubes, or transistors. Its electronic circuits work a thousand times faster than the nerve cells in the human brain. A problem that might take a human being two years to solve can be solved by a computer in one minute, but in order to word properly, a computer must be given instructions and it must be programmed. Computers can be designed for many specialized purpo
A. make fewer errors
B. do not have to be programmed
C. work more quickly
D. understand their instructions
[单项选择]After years of strenuous work, the scientists are on the __________.of a great discovery of human gene.
A. domain
B. premise
C. threshold
D. pretext
[单项选择]Thirty years of field work enabled the female scientist to gain a better______ into the nature as it is.
A. insight
B. discovery
C. concept
D. conviction
[单项选择]There are still many problems ahead of us, but fortunately we can see the light at the end of the ______ by the terrific feedback I got from the market this time.
A. campaign
B. day
C. tunnel
D. road
[单项选择]There are still many problems ahead of us, but by this time next year we can see light at the end of the ______.
A. battle
B. day
C. road
D. tunnel
[单项选择]During these ten years, many new methods have been ______ in the field of foreign language teaching.
A. adopted
B. adapted
C. alarmed
D. aided
[单项选择]After using the device two years, many Seton nurses ______.
A. still hate the locator badges
B. have gone on strike
C. are still protesting
D. now like them
[单项选择]He is quite worn out from years of hard work. He is not the man ______ he was twenty years ago.
A. which
B. that
C. who
D. whom
