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【简答题】
根据目的产品的不同，原油加工方案大体上可分为（）、（）和（）三种基本类型。
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反馈参考答案：
举一反三
【单选题】When the foreign guest arrived, I found him speaking good Chinese. I _______ his speech into Chinese the night before. [ ]
A.
needn't translate
B.
didn't need to translate
C.
needn't have translated
D.
didn't need translating
【简答题】安全的经济功能主要体现于( )和( )两个方面。
【简答题】警察影像的台词包括______、独白以及画外音等。
【简答题】用单万向节传递相交轴之间的运动时, 其瞬时角速比______, 平均角速比_____。
【单选题】Most of the guest()when he arrived at the party.
A.
left
B.
was left
C.
have left
D.
had left
【单选题】求解生产与存储问题时,下列说法正确的是: ( )
A.
状态变量为期初存储量，决策变量为生产量
B.
阶段指标函数是从第k阶段到第n阶段的总成本
C.
过程指标函数是从第k阶段到下一阶段的总成本
D.
状态变量为需求量，决策变量为生产量
【简答题】Tom’s family was holding a larger evening party. It was to celebrate Tom’s 15th birthday. At about 6 o’clock, Jim ,Tom’s best friends , arrived with a big birthday gift. Tom opened it in front of Jim ...
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