According to historians and specialists in demography,there are（）great population movement(s)in the history of the United States...

第1题

[单选题] According to Maori oral history,New Zealand was discovered by（）

A、Abel Tasman B、James Cook C、Kupe D、Maui

第2题

[单选题] Air compressor cylinder un-loaders enable the compressor to （）.

A、vary their speed according to temperature and load B、start and come up to speed before air compression begins C、change speed according to overload demands D、reduce compressed air charge density

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第3题

[单选题] Waste oil should（）

A、be treated according to the C-Es command exactly B、be treated according to MARPOL C、accumulate in bilges or on tank tops in accordance with MARPOL D、discharge to sea at the specified areas

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第4题

[单选题] 以下（）可以代替history.forward（）的功能。

A、history.go（0） B、history.go（-1） C、history.go（1） D、history.go（2）

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第5题

[简答题] According to Krashen, there is only one way for human to acquire language. What is it?

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第6题

[多选题] To set the history retention period for either window logging or job logging individually, which parameters of the SET_SCHEDULER_ATTRIBUTE procedure need to be used?（）

A、LOG_HISTORY B、JOB_LOG_RETENTION C、WINDOW_LOG_RETENTION D、WHICH_LOG E、LOG_NAME

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