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离心脱水机运行过程中应注意的问题是什么？

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You conned using SQL Plus to the root container of a multitenant container database (CDB) with SYSDBA privilege. The CDB has several pluggable databases (PDBs) open in the read/write mode. There are ongoing transactions in both the CDB and PDBs. What happens alter issuing the SHUTDOWN TRANSACTIONAL statement?（）

A. The shutdown proceeds immediately. The shutdown proceeds as soon as all transactions in the PDBs are either committed or rolledhack.
B. The shutdown proceeds as soon as all transactions in the CDB are either committed or rolled back.
C. The shutdown proceeds as soon as all transactions in both the CDB and PDBs are either committed or rolled back.
D. The statement results in an error because there are open PDBs.

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16年1月7日生的二孩，产假应该是多少天？依据是哪条法规？

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在编译linux2.6版本的内核通常直接输入“make dep”即可。（）

A. 正确
B. 错误

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在大雨大雪天气条件下，要探测较远距离的物标，选用下列哪种工作波长为佳？（）

A. 5厘米
B. 8厘米
C. 3厘米
D. 10厘米

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