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【简答题】
交流接触器KM2的辅助触点(3-13)的13处断路,将会出现什么故障现象?
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Senility refers to great losses of intellectual capacity that occurs in old age and is associated with the widespread loss of nerve cells and the shrinkage of brain tissue. Senility is a great decline...
A.
level
B.
extent
C.
scope
D.
criterion
【单选题】二阶系统的标准传递函数为( )
A.
ω n /(S 2 +2ξω n S+1) （ ξ=1）
B.
ω n /(S 2 +2ξω n S+1) (0
C.
1/[S（TS+1）]
D.
T 2 /（T 2 S 2 +2ξTS+1） (0
【简答题】A．All professional athletes. B．All stars. C．A few stars. D．International tennis stars.
【单选题】The national flag of the United States is called 'the Stars and Stripes', with______ stars and______horizontal stripes on it.
A.
51, 12
B.
50, 13
C.
51, 15
D.
50, 12
【单选题】某企业权益和负债资金的比例为6：4，债务资本成本为7％，股东权益资本成本为15％，所得税税率为25％，则平均资本成本为( )。
A.
ll．8％
B.
13％
C.
8．4％
D.
11％
【单选题】Senility refers to great losses of intellectual capacity that occurs in old age and is associated with the widespread loss of nerve cells and the shrinkage of brain tissue. Senility is a great decline...
A.
level
B.
extent
C.
scope
D.
criterion
【单选题】40 kilometers _____ Chengdu lies a town, _____ suffered great losses in the earthquake, but is now on the road to recovering.
A.
west of; which
B.
on the west in; where
C.
west of; where
D.
on the west of; which
【单选题】The 50 stars in the national flag of America represent 50 .
A.
cities
B.
famous presidents
C.
states
D.
senate members
【单选题】The 50 stars on the Americas national flag represent its 50
A.
current states.
B.
nations.
C.
colonial states.
D.
cities.
【多选题】Why does the American flag have 50 stars?
A.
Because there is one star for each state
B.
Because there are 50 cities in America
C.
Because each star represents a state
D.
Because there are 50 states in America
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