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They hoped to create a computer which could __________ at l0 times the speed of computers on the market.

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Education is a(n) ____________ learning process that never ends. A teacher has the responsibility of making students think for themselves by giving effective guidance.

On the one hand, we should make efforts to improve the economy ; on the other hand, we must keep a balance between ___________ development and environmental protection.

Some successful people managed to gain _______and fortune even though they dropped out of school.

A(n) _________ is a very small piece of matter with a negative electrical charge, found in all atoms.

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