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【单选题】
关于平衡态,以下说法正确的是:
A.
描述气体状态的状态参量P、V、T不发生变化的状态为平衡态
B.
在不受外界影响的条件下,热力学系统各部分的宏观性质不随时间变化的状态称为平衡态
C.
C、气体内分子处于平衡位置的状态称为平衡态
D.
D、处于平衡态的热力学系统,分子的热运动停止
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【简答题】中间继电器的主要作用有哪些?
【单选题】点M(a,b)在由不等式组 确定的平面区域内,则点N(a+b,a-b)所在平面区域的面积是
A.
1
B.
2
C.
4
D.
8
【单选题】Medieval travelers' tales of fantastic creatures were often fascinating but not always ______.
A.
creditable
B.
imaginable
C.
credible
D.
conceivable
【单选题】One of the things we have to do to prevent a pandemic is to make sure people understand and know what they can do to minimize the commotion.
A.
command
B.
collusion
C.
turmoil
D.
tutelage
【单选题】已知D是由不等式组 所确定的平面区域,则圆 在区域D内的弧长为(     )
A.
B.
C.
【单选题】已知点M(a,b)在由不等式组 确定的平面区域内,则点N(a+b,a-b)所在平面区域的面积是 [     ]
A.
1
B.
2
C.
4
D.
8
【单选题】已知D是由不等式组 x+2y≥0 2x-y≥0 所确定的平面区域,则圆x 2 +y 2 =4在区域D内的弧长为(  )
A.
π 4
B.
π 2
C.
π
D.
【简答题】A group of travelers were having dinner in a restaurant .While they were eating fish, they began to tell stories about finding valuable stones inside fish . An old man ,who had listened to their conve...
【单选题】One of the greatestof unhappiness,in my experience,is the difficulty we have in accepting things
A.
30.One of the greatest of unhappiness,in my experience,is the difficulty we have in accepting things as they are. A.reasons
B.
styles
C.
supplies
D.
Sources
【单选题】营生资产以H表示,养生负债以F表示,当前拥有的资产以A表示,当前存在的负债以L表示。那么,在全生涯资产负债表中,总资产与总负债之间的差异就是净值,如果以E表示,则( )
A.
E=(F+L)-(H+A)=遗产或负债
B.
E=(H+F)-(A+L)=遗产或负债
C.
E=(H+L)-(F+A)=遗产或负债
D.
E=(H+A)-(F+L)=遗产或负债
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