数学模型是利用计算机建立虚拟的汽车外形实物模型，它可以在计算机上模拟装配、调整冲压方向。
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They are peacemakers who have always _____for an end to war.
A. searched
B. sought
C. hunted
D. comb
The interview is to select the most _____ candidates.
A. promising
B. prospective
C. hopeful
D. helpful
If a company _____ a new product, it makes it available to the public.
A. produces
B. develops
C. launches
D.sells
No single document could _____ all the shades of interpretation.
A. have
B. encompass
C. surround
D. write
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