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【单选题】
水准仪的i角是指( )二者在竖直面(与视准轴平行)上的投影交角。A.
水准管轴与视准轴
B.
竖轴与视准轴
C.
纵丝与视准轴
D.
圆水准器轴与视准轴
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举一反三
【单选题】Our class is on _____ floor of the Classroom Building. [ ]
A.
two
B.
the two
C.
second
D.
the second
【单选题】______ of the students in our class are from the north.
A.
Two ninth
B.
Second ninth
C.
Second nines
D.
Two ninths
【单选题】We can have some food after ______ class. [ ]
A.
the second
B.
second
C.
two
D.
No. 2
【单选题】听力原文：M: The single fare is $832 first class and $516 second class. And the return fare is the same price. W: Second class, with a return ticket, please. Q: how much should the woman pay for the ticket...
A.
$1,664
B.
1032
C.
1348
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