单项选择题

In what way is ethics comparable to language usage

A．Both have rules to make the optimal choice under a circumstance.
B．Both vary according to the context they are applicable to,
C．Both are thought to be objective, not subjective, existence.
D．Both contain sets of rules applied in quite different conditions.

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单项选择题

It can be inferred from the text that

A．certain areas in pure research are not fully explored.
B．applied investigation requires greater scientific ability.
C．applied research is inferior to pure research.
D．knowledge is useless unless it is put into practice.

单项选择题

Some people look down on applied research because they think that

A．it is a kind of prearranged investigation.
B．no new knowledge can arise from applied research.
C．it is more difficult to get results in applied research.
D．no specific scientific ability is needed in applied research.