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【简答题】
三相异步电动机能耗制动的方法是：将运行时的______绕组从三相交流电源上断开，立即接到______电源上。
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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.
【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
【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,捕食黄雀并栖息于林中。下列叙述正确的是
A.
鹰的迁入增加了该树林中蝉及其天敌的数量
B.
该生态系统中细菌产生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.
鹰的迁入增加了该生态系统能量流动的方向
【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 s 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
【简答题】What is NOT true of the effectiveness of 'sunscreen', according to the last paragraph?
【单选题】According to the fifth parag,aph，what is the suggested method to control underground fires?
A.
Using remote sensing technique．
B.
Controlling the release of carbon dioxide．
C.
Making the soil heat resistant．
D.
Cutting off the oxygen supply．
【单选题】'When one of the doctors criticizes 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 to criticis...
A.
argued bitterly with his employer
B.
was angry and gave up his job
C.
was sorry for himself
D.
was sad but confident
【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
【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.
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