对于直流送端孤岛系统,除发电机组自身具有的一次调频能力外,还有必要采取()功能。A.

题型:单项选择题

问题:

对于直流送端孤岛系统,除发电机组自身具有的一次调频能力外,还有必要采取()功能。

A.直流频率控制

B.直流功率紧急提升

C.直流功率紧急下降

D.直流潮流反向

考点:电力系统调度运行考试电力系统调度运行考试题库
题型:单项选择题

目前在供热外线中应用较多的室外供热管道敷设方式是( )。

A.直埋敷设
B.枝状敷设
C.架空敷设
D.地沟敷设

题型:单项选择题

PKA所含的亚基数为()

A.1个

B.2个

C.3个

D.4个

E.5个

题型:单项选择题

The client was admitted with severe head injury resulting from a motor vehicle accident. The client is presently unconscious. To facilitate rehabilitation when the client's condition allows, the nurse should

A.maintain limbs in the position of function.

B.apply restraints to arms and legs to control spasms.

C.exercise just the arms as the legs maintain their tone longer.

D.notify physical therapy as soon as the physician orders passive range of motion.

题型:单项选择题

农用配电箱(JP柜)为户外型配电装置,它的优点有()。

A.投资省

B.安装工期短

C.功能全

D.外形美观

题型:单项选择题

税务行政复议机关审查行政复议案件主要审查哪些内容?

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