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【单选题】
∑ESi表示所有增环的上极限偏差之和,∑EIi表示所有增环的下极限偏差之和,∑ESj表示所有减环的上极限偏差之和,∑EIj表示所有减环的下极限偏差之和,那么,封闭环的下极限偏差为( )。A.
∑EIi+∑ESj
B.
∑EIi -∑ESj
C.
∑EIi+∑EIj
D.
∑EIi -∑EIj
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A.
other
B.
others
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the other
D.
the others
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A.
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B.
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C.
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D.
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E.
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A.
not very much ，and
B.
as much，but
C.
not so much ，as
D.
as much as，and
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A.
the other way
B.
by the other way
C.
another way
D.
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