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【单选题】
国家三角测量规范规定，二等三角测量按三角形的闭合差计算的测角中误差不得超过( )。A.
1″
B.
0.5″
C.
0.7″
D.
1.8″
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举一反三
【单选题】Given the pushing sequence of a stack as {6, 5, 4, 3, 2, 1}. Among the following, the impossible popping sequence is:
A.
2 3 4 1 5 6
B.
3 4 6 5 2 1
C.
5 4 3 6 1 2
D.
4 5 3 1 2 6
【单选题】--- What time do I have to leave, Dr Li? --- _________, don’t stay here ________ visiting hours.
A.
Usually; over
B.
Regularly; above
C.
Anyway; beyond
D.
Mostly; during
【单选题】Is there _______ here? If not, don't stay here alone. [ ]
A.
anyone
B.
somebody
C.
anyone else
D.
everyone
【单选题】Pushing sequence of a stack is {1,2, ⋯ ,n } .If the second number of popping sequence is 2,then how many possible choices are there for the first one?
A.
1
B.
2
C.
3
D.
Not sure
【单选题】Pushing sequence of a stack is {1,2, ⋯ ,n } .If the second number of popping sequence is n,then how many possible choices are there for the first one?
A.
n−1
B.
n−2
C.
n−3
D.
Not sure
【单选题】Is there _____ here? If not, don't stay here alone. [ ]
A.
anyone
B.
someone
C.
anyone else
D.
everyone else
【单选题】Pushing sequence is {1,2, ⋯ ,100}.In popping sequence,before 10,there are four numbers larger than 10 .Which one cannot be popped out before 10.
A.
5
B.
6
C.
14
D.
15
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