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【单选题】
The Pan Am pilot circled round for hours and then the plane was heading for Hartford. When we got to Hartford, he didn't let anyone leave the plane toA.
transfer to another flight.
B.
make a phone call.
C.
complain to the service department.
D.
buy something at the airport.
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反馈参考答案：
举一反三
【简答题】Before going to the cashier, the writer knew nothing about the price of the mouse.
【单选题】在可变分区存储管理中,某作业完成后要回收其主存空间,该空间可能要与相邻空闲区合并。在修改空闲区表时,使空闲区个数不变且空闲区始址不变的情况是 _________ 。
A.
无上邻也无下邻空闲区
B.
无上邻但有下邻空闲区
C.
有上邻也有下邻空闲区
D.
有上邻但无下邻空闲区
【单选题】接触某种化学物后体内不一定能检出该物质,但由该物质引起的机能改变却逐步积累起来,表现出中毒的病理征象,这种情况称为()
A.
蓄积
B.
物质蓄积
C.
功能蓄积
D.
生物浓集
E.
生物转化
【简答题】Astronomers knew about ______ before they were able to confirm their existence.
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