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Success, it is often said, has many fathers—and one of the many fathers of computing, that most successful of industries, was Charles Babbage, a 19th-century British mathematician. Exasperated by errors in the mathematical tables that were widely used as calculation aids at the time, Babbage dreamed of building a mechanical engine that could produce flawless tables automatically. But his attempts to make such a machine in the 1920s failed, and the significance of his work was only rediscovered this century.
Next year, at last, the first set of printed tables should emerge from a calculating "difference engine" built to Babbage’s design. Babbage will have been vindicated. But the realization of his dream will also underscore the extent to which he was a man born ahead of his time.
The effort to prove that Babbage’s designs were logically and practically sound began in 1985, when a team of researchers at the Science
A. he was very disappointed at the mathematical tables available at the time
B. he wanted to be the first man to invent a computing machine
C. he intended to make the mathematical tables flawless
D. he thought he was doing a significant work
So what is depression Depression is often more about anger turned (1) than it is about sadness. But it’s usually (2) as sadness. Depression can (3) at all ages, from childhood to old age, and it’s the United States’ No. 1 (4) problem.
When someone is depressed, her behavior (5) change and she loses interest in activities she (6) enjoyed (like sports, music, friendships). The sadness usually lasts every day for most of the day and for two weeks or more.
What (7) depression A (8) event can certainly bring (9) depression, but some will say it happens (10) a specific cause. So how do you know if you’re just having a bad day (11) are really depressed Depression affects your (12) , moods, behavior and even your physical health. These changes often go (13) or are labeled (14) simply a bad case of the blues.
Someone who’s truly (15)
A. justified
B. extended
C. identified
D. matched
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