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【单选题】
G00 指令与下列的 指令不是同一组的。A.
G01
B.
G02，G03
C.
G04
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举一反三
【单选题】We generally take the convention of safety of life at sea adopted in 1974 as a completely new convention, the reason is _____.
A.
it included the amendments agreed up until that date
B.
it included none of the amendments agreed up until that date
C.
it required two thirds of the Parties’ acceptance for a amendment to enter into force
D.
it included a tacit acceptance procedure
【简答题】证明折射光束的方向是等光程方向．即证明图1-14中 L(A 1 B 1 D 1 )=L(A 2 B 2 D 2 )．
【简答题】设D=[0，1]×[0，1]，证明函数 在D上部可积。
【简答题】证明 若Dξ=0，则{x=Eξ}=1．
【单选题】We generally take the convention of safety of life at sea adopted in 1974 as a completely new convention, the reason is（）
A.
it included the amendments agreed up until that date
B.
it included none of the amendment agreed up until that date
C.
it required two thirds of the Parties’ acceptance for a amendment to enter into force
D.
it included a tacit acceptance procedure
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