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【多选题】
变压器零差保护相对于反映相间短路的纵差保护来说有（）优缺点A.
零差保护的不平衡电流与空载合闸的励磁涌流、调压分接头的调整无关，因此，其最小动作电流小于纵差保护的最小动作电流，灵敏度较高
B.
零差保护所用电流互感器变比完全一致，与变压器变比无关
C.
零差保护与变压器任一侧断线的非运行方式无关
D.
由于零差保护反映的是零序电流有名值，因而当其用于自藕变压器时，在高压侧接地故障时，灵敏度较低
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举一反三
【单选题】He tried to join the army, but was _____ because of poor health.
A.
returned
B.
rejected
C.
avoided
D.
failed
【单选题】He tried to join the army but was _____because of the poor health.
A.
turned off
B.
turned out
C.
turned away
D.
turned down
【单选题】He tried to join the army but was _____ because of poor health, which made him depressed.
A.
selected
B.
abused
C.
overcome
D.
rejected
【单选题】当教师提问一个四边形,每边边长是1,面积是否是1?许多同学肯定的回答是1,留校系翔却回答说,如果把它压扁,变成一条线,面积就差不多成0。这体现了发散思维的()
A.
流畅性(2011年下)
B.
变通性
C.
独特性
D.
独立性
【单选题】He tried to join the army but was ______ because of poor health.
A.
turned up
B.
turned down
C.
turned off
D.
turned in
【简答题】稀释性自体输血的适应证和禁忌证是什么?
【单选题】He tried to join the army, but was because of poor health.
A.
returned
B.
rejected
C.
avoid
D.
failed
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