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
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单项选择题
What is the decisive factor in future competition between nations
A．Oil.
B．Technological skill.
C．Natural resources.
D．Education.
单项选择题
Which one of the following is NOT true for the reason why people prefer to buy wood-burning stoves
A．The initial cost is very low.
B．The fuel costs are cheaper.
C．Wood fires are more efficient, cleaner, and safer than ever before.
D．The wood-burning stoves are more efficient than gas or oil ones.
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