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【单选题】
零序电流III段保护作为近后备保护时，其灵敏度校验应（）A.
按本线路末端接地短路时，流过保护装置的最小零序电流校验
B.
按相邻线路末端接地短路时，流过保护装置的最小零序电流校验
C.
按本线路末端接地短路时，流过保护装置的最大零序电流校验
D.
按相邻线路末端接地短路时，流过保护装置的最大零序电流校验
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举一反三
【单选题】某旅游景区门票为30元,但景区内的许多重要景点没有包括在门票内,旅客要重新购票才能参观。这是哪种定价策略?( )
A.
阶段定价策略
B.
弹性定价策略
C.
个别定价策略
D.
心理定价策略
【单选题】We couldn’t read the notice on the board because several people were standing _______ it.A．in fr
A.
72. We couldn’t read the notice on the board because several people were standing _______ it. A．in front of
B.
in the front of
C.
at the back of
D.
in back of
【单选题】(2013·北京，34)If we________a table earlier, we couldn't be standing here in a queue.
A.
have booked
B.
booked
C.
book
D.
had booked
【单选题】If we________a table earlier，we wouldn’t be standing here in a queue.(2013·北京，34)
A.
have booked
B.
booked
C.
book
D.
had booked
【单选题】If we （ ）a table earlier, we couldn’t be standing here in a queue.
A.
have booked
B.
booked
C.
book
D.
had booked
【单选题】If we ______a table earlier , we wouldn't be standing here in a queue .
A.
have booked
B.
booked
C.
book
D.
had booked
【单选题】(2013·高考北京卷)If we________a table earlier，we couldn’t be standing here in a queue.
A.
have booked
B.
booked
C.
book
D.
had booked
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