单项选择题

A．The man’ s test.
B．The woman’ s research paper.
C．Go swimming over at the student center.
D．Plans for the evening.
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单项选择题
Lens design and chess playing are similar in that______.
A．the final goal and the means by which it can be reached are known
B．perfect solutions to a problem can be found
C．any one decision at any point along the way to the goal can bring numerous possible results
D．both A and C
单项选择题
Lens designers today______.
A．have a large source of help to fall back on
B．receive a low salary
C．are less respectable than those of the past
D．are not decisive in the lens design
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