单项选择题

It is implied rather than clearly stated in the first paragraph that______.

A．science is concerned about the natural world
B．technology is the result of applied science
C．a scientist is a cultivator of science
D．the scientific method is indispensable in the pursuit of science

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单项选择题

Which of the following questions might the Curies NOT ask in their investigations

A．What was radiation exactly
B．What materials might have radioactivity
C．How could man avoid powerful radioactivity
D．How strong is the radioactivity of radium

单项选择题

What happened in scientific circles after the Curies had completed the final step

A．Scientists used deductive reasoning to test their investigations,
B．Scientists were concerned with probability in their investigations.
C．Scientists read their reports and examined their investigations.
D．Scientists were critical of their investigations.