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【判断题】
特种作业人员必须持证上岗，严禁无证操作。A.
正确
B.
错误
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【简答题】广西壮族自治区的简称是( ),省会城市是( )
【简答题】Johnny Smith was a good math student at a high school. He loved his computer. He came home early every day, then he worked with it till midnight. But Johnny was not a good English student, not good at...
【简答题】广西壮族自治区的简称是_____。(五级、四级)
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