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【单选题】
已知一个栈的进栈序列为p1,p2,p3......pn ,其输出序列是1,2,3......n 。若pn=1, 则p1 的值是( )A.
n-i+1
B.
n-i
C.
i
D.
不确定
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举一反三
【单选题】— He’s never stolen anything before，______ he? —______ ．It’s his third time to be taken to the police station．
A.
hasn’t：Yes
B.
is；Yes
C.
has；Yes
D.
has；No
【单选题】----He’s never sung English songs before, __________he? ----_________. It’s his second time to sing in English.
A.
has; Yes
B.
is; Yes
C.
has; No
D.
is; No
【简答题】Fill in each blank with the correct word or phrase according to the definition. in case of; put ... to use; widespread; approach; effective; a method of doing something or dealing with a probl...
【单选题】Tom's parents will be back from London _____. [ ]
A.
long before
B.
before long
C.
soon after
【单选题】It is in the chairman of the board's interest, before a meeting, to ______ with the directors about sensitive matters.
A.
confer
B.
contend
C.
conspire
D.
consort
【单选题】The man entered the room and looked everywhere _____ in search of something. [ ]
A.
so that
B.
even if
C.
as if
D.
in case
【简答题】We should ________(留存) an amount of money in case something unexpected happens.
【判断题】Are flashbacks often used to retell events that happened before the story's primary sequence of events to fill in important moments。()
A.
正确
B.
错误
【单选题】He's never stolen anything before, _____ he? _____. It's his third time to be taken to police station. [ ]
A.
hasn't; Yes
B.
is; Yes
C.
has; Yes
D.
has; No
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