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【单选题】
在机械加工工艺过程中安排零件表面加工顺序时,要“基面先行”的目的目的是( )A.
避免加工时轴线偏斜
B.
避免加工表面产生加工硬化
C.
消除工件残余应力
D.
使后续工序有精确的定位基面
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反馈参考答案：
举一反三
【判断题】Companies today will not accept slower order cycles in exchange for higher order cycle consistency.
A.
正确
B.
错误
【判断题】Companies today will not accept slower order cycles in exchange for higher order cycle consistency.
A.
正确
B.
错误
【单选题】According to a recent survey, employees in many companies today work longer hours than employees did in 1979．They also take shorter vacations than employees in 1979．It seems that Americans are working...
A.
Many people work long hours but do not always do a lot of work.
B.
Most people can get more work done by working longer hours.
C.
Most Americans work 80 hours a week and some work even longer.
D.
People can make more money by working longer hours.
【单选题】下列哪种疾病属于急性病毒感染的迟发并发症（）
A.
脊髓灰质炎病毒所致小儿麻痹症
B.
HBV所致慢性乙肝
C.
麻疹病毒所致亚急性硬化性全脑炎
D.
乙脑病毒所致乙型脑炎
E.
SARS冠状病毒所致严重急性呼吸综合征
【判断题】For companies today, becoming international is a luxury only some can afford.
A.
正确
B.
错误
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