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【简答题】
若a＞0，则 |a| a =______；若a＜0，则 |a| a =______．
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【判断题】Q-L17-3 An airline requiring revenue conditioned by a Requirement for its carriage on domestic and/or international sectors will be assumed to accept that the requirement.
A.
正确
B.
错误
【简答题】简述条码技术的特点?
【判断题】Q-L17-3 An airline requiring revenue conditioned by a Requirement for its carriage on domestic and/or international sectors will be assumed to accept that requirement.
A.
正确
B.
错误
【简答题】比如,首字母大写
【单选题】听力原文： An airline is an organization which provides aviation services for passengers and cargo. It owns or leases airlines for reasons of mutual benefits. The scale and scope of airline companies range...
A.
The market plays an important role in airline service.
B.
It introduces the history of the aviation service.
C.
It describes airline companies.
D.
It introduces the scale and scope of airline companies.
【简答题】《宣言》是科学社会主义的()纲领性文件,标志着()的诞生。
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