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【判断题】
视图主要用于表达机件的外部结构和形状,分为基本视图、向视图、局部视图和斜视图四种。A.
正确
B.
错误
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【简答题】E-Commerce wa first______(develop) in hte 1960s.
【单选题】Of course, the trend today is to use computers since the process is often ( repetitive) and complex, and computers greatly simplify the task
A.
intermittent
B.
repetitious
C.
replaceable
D.
tedious
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