Which one of these statements is true of OSPF type 5 LSAs？ （）
A. They are used to summarize area routes to other areas.
B. They are used in not-so-stubby areas to propagate external routes.
C. They are used to notify areas of the ASB
D. They are flooded to all areas except stub areas （external route）.
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如果不对分油机进行调整而直接用重油分油机分轻油时，将会产生（）。
A. 出水口跑油
B. 分离效果差
C. 排渣口跑油
D. 分油机正常工作
电子沿水平方向扫的描称为行扫描，电子沿垂直方向的扫描称为场扫描。
A. 正确
B. 错误
我国政府审计采用的是（）。
A. 行政模式
B. 司法模式
C. 立法模式
D. 独立模式
Logbooks are used to record the events occurring when（）.
A. the ship is in a harbor
B. the ship is at anchorage
C. the ship is underway
D. all of the above
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