单项选择题

Why does further study become indispensable

A．People want to do more jobs.
B．People want to attain this extraordinary level of education.
C．People would not rest on the past achievements.
D．What we know becomes obsolet

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单项选择题

The main idea of this passage is ______.

A．Knowledge of a Computer
B．Importance of a Computer
C．Function of Knowledge
D．Function of Technology

单项选择题

Which of the following statements is NOT true

A．Wood-bunting stoves are safer and more efficient than they used to be.
B．No factories exist for the purpose of producing dirty wood chips.
C．Both catalytic combustors and wood agitators save money in the long run.
D．Wood-burning stoves with catalytic combustors cost between $ 100 and $ 200.