来自05年6月机经
A. 1954 is sometimes given as the date of the technique of the invention, when sb do sth ..., sb do sth ...
B. The technique of the invention is sometimes dated to 1954, 后面与A一样.
大家觉得选哪个?个人觉得B好点,A中的1954 is given逻辑上有问题
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