单项选择题

When weighing things, a scientist ______.

A．adopts a more accurate measurement than a baker does
B．uses a scale working on completely different principles
C．has to construct a lab with a variety of apparatus
D．turns to scientific investigation by instinct

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热门试题

单项选择题

To acquire the method of scientific investigation, one ______.

A．needs do necessary exercises on his/her mind
B．has to reason things and get accurate explanations
C．has to analyze the reasons of all the phenomena
D．needs practice balance skills constantly

单项选择题

By means of induction and deduction, ______.

A．scientists create theories based on Nature
B．ordinary people fulfill daily activities
C．ordinary people benefit from Nature
D．scientists develop skills in science work