在美国的北部，汽车技工必须要有“A 级证书，”要想得到这“A 经级证书”，学徒工必须在车行工作9000个小时，并完成一定的课程，笔试合格。

RC: In North America, mechanics have to get their "Class A License. " Getting the license requires about 9,000 hours of work as an apprentice, completion of college courses and passing a written test.

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