Online English Test

Đọc đoạn văn sau và trả lời các câu hỏi:

1. Today's leading large computer
(A) is cooled by a system based on liquid nitrogen.
(B) generates considerable heat in its circuits.
(C) is smaller in size than the super computers referred to.
(D) has half a million chips.
2. It may be inferred from the passage that
(A) if chips are packed closer together, a computer needs stronger refrigeration.
(B) a computer the size of a shoe- box generates more heat than a larger one.
(C) more powerful computers tend to be smaller.
(D) the leading large computer is now cooled by liquid nitrogen.
3. According to the passage, the super-computers
(A) are already viable propositions.
(B) might melt in a bath of liquid nitrogen.
(C) would pack 300,000 chips into about 100 cubic feet.
(D) would be more compact than today's models.
4. The passage deals mainly with
(A) the number of chips modern computers use.
(B) the problem of cooling tomorrow's super-computers.
(C) the optimum size for computers.
(D) the cooling properties of liquid nitrogen.