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These items are available in for the VP380 modes only．
Arbitration is a means of settling disputes between two parties through the medium of a third party who is not partial to either of the parties to the dispute. ()
已知两直线和则它们是()．
(A)两条相交的直线(B)两条异面直线
(C)两条平行但不重合的直线(D)两条重合的直线
Please make sure that the country of origin in a certificate of origin is specified, and meets the requirements of the documentary ______.
2．设a=(2，3，5)，b=(2，-4，c)，a⊥b，则常数c=______。