单项选择题

A．Nervous and unsure of herself.
B．Calm and confident of herself.
C．Courageous and forceful.
D．Distracted and reluctant.
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wickedness
单项选择题
It can be inferred from the passage that scientists of the 18th century________.
A．thought that they knew a great deal and could solve most problems of science
B．were afraid of facing up to the realities of scientific research
C．knew that they were ignorant and wanted to know more about nature
D．did more harm than good in promoting man’’s understanding of nature
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