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根据允许中断供电时间选择应急电源，下列说法正确的是( )。
A.
允许中断供电时间为15s以上的供电，可选用快速自启的发电机组
B.
允许中断供电时间为30s及以下的供电，可选择带有自动投入装置的独立于正常电源的专用馈电线路
C.
允许中断供电时间为毫秒级的供电，可选用蓄电池静止型不间断供电装置，蓄电池机械贮能电机型不间断供电装置或柴油机不间断供电装置
D.
允许中断供电时间为10s及以上的供电可选择发电机组
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参考答案：
举一反三
【单选题】Which of the following best states the 'particular pedagogical purpose' mentioned in paragraph 3?
A.
To minimize the trivial aspects of the traditional scholarly methods course.
B.
To provide students with information about Griffith's work.
C.
To encourage scholarly rigor in students' own research.
D.
To reestablish Griffith's reputation as an author.
查看完整题目与答案
【单选题】我国谚语中的“螳螂捕蝉,黄雀在后”体现了食物链的原理。若鹰迁入了蝉、螳螂和黄雀所在的树林中,捕食黄雀并柄息于林中。下列相关叙述正确的是( )
A.
鹰的迁入增加了该树林中蝉的数量
B.
该生态系统中细菌体内的能量可流向生产者
C.
鹰的迁入增加了该生态系统能量消耗的环节
D.
鹰的迁入改变了该生态系统能量流动的总量
查看完整题目与答案
【单选题】The etiology of a disease is its
A.
cause
B.
cure
C.
diagnosis
D.
intensity
E.
longevity
查看完整题目与答案
【单选题】'When one of the doctors criticizes(批评) me, I get defensive. I feel like a child again, being scolded, and I want to explain that I'm not wrong.' says Viola, a nurse. This is a common reaction(反应) to ...
A.
argued bitterly with his employer
B.
was angry and gave up his job
C.
was sorry for what he did
D.
was sad and self-pitying
查看完整题目与答案
【简答题】If a pre-printed "Shipped on board" charter party bill of lading is presented, its issuance date will be deemed to be the date of shipment unless it bears an on board notation in which the date ...
查看完整题目与答案
【简答题】The British, Dutch and German governments will pre-finance Iceland so that it can meet its ______within a short period of time.
查看完整题目与答案
【单选题】In the sentence 'The Romans usually sold in this way the spoils taken in the war' of paragraph 2, the word 'spoils' most probably means ______.
A.
useless goods
B.
spears
C.
various kinds of food
D.
property taken from the enemy
查看完整题目与答案
【单选题】Which of the following is NOT true of Hurricane Katrina according to the last paragraph?
A.
The area affected is almost as big as the UK.
B.
It has left a disaster zone of 90,000 square miles.
C.
Over half a million people have been forced to leave their homes.
D.
This crisis is more serious than that of the Great Depression.
查看完整题目与答案
【单选题】How do you feel? [     ]
A.
I'm very cold.
B.
I'm okay.
查看完整题目与答案
【单选题】The word 'cover' in 'Newsweek and Time magazines have both covered the phenomenon' ( paragraph 2 ) means ______.
A.
place one thing over another
B.
include
C.
report
D.
protect
查看完整题目与答案
相关题目：
【单选题】Which of the following best states the 'particular pedagogical purpose' mentioned in paragraph 3?
A.
To minimize the trivial aspects of the traditional scholarly methods course.
B.
To provide students with information about Griffith's work.
C.
To encourage scholarly rigor in students' own research.
D.
To reestablish Griffith's reputation as an author.
查看完整题目与答案
【单选题】我国谚语中的“螳螂捕蝉,黄雀在后”体现了食物链的原理。若鹰迁入了蝉、螳螂和黄雀所在的树林中,捕食黄雀并柄息于林中。下列相关叙述正确的是( )
A.
鹰的迁入增加了该树林中蝉的数量
B.
该生态系统中细菌体内的能量可流向生产者
C.
鹰的迁入增加了该生态系统能量消耗的环节
D.
鹰的迁入改变了该生态系统能量流动的总量
查看完整题目与答案
【单选题】The etiology of a disease is its
A.
cause
B.
cure
C.
diagnosis
D.
intensity
E.
longevity
查看完整题目与答案
【单选题】'When one of the doctors criticizes(批评) me, I get defensive. I feel like a child again, being scolded, and I want to explain that I'm not wrong.' says Viola, a nurse. This is a common reaction(反应) to ...
A.
argued bitterly with his employer
B.
was angry and gave up his job
C.
was sorry for what he did
D.
was sad and self-pitying
查看完整题目与答案
【简答题】If a pre-printed "Shipped on board" charter party bill of lading is presented, its issuance date will be deemed to be the date of shipment unless it bears an on board notation in which the date ...
查看完整题目与答案
【简答题】The British, Dutch and German governments will pre-finance Iceland so that it can meet its ______within a short period of time.
查看完整题目与答案
【单选题】In the sentence 'The Romans usually sold in this way the spoils taken in the war' of paragraph 2, the word 'spoils' most probably means ______.
A.
useless goods
B.
spears
C.
various kinds of food
D.
property taken from the enemy
查看完整题目与答案
【单选题】Which of the following is NOT true of Hurricane Katrina according to the last paragraph?
A.
The area affected is almost as big as the UK.
B.
It has left a disaster zone of 90,000 square miles.
C.
Over half a million people have been forced to leave their homes.
D.
This crisis is more serious than that of the Great Depression.
查看完整题目与答案
【单选题】How do you feel? [     ]
A.
I'm very cold.
B.
I'm okay.
查看完整题目与答案
【单选题】The word 'cover' in 'Newsweek and Time magazines have both covered the phenomenon' ( paragraph 2 ) means ______.
A.
place one thing over another
B.
include
C.
report
D.
protect
查看完整题目与答案
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