下列能够有效地防御未知的新病毒对信息系统造成破坏的安全措施是
A
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Wearegladtoallowyou5%commissionwiththeview______businessrelationswithyou.
Incaseyoucanmakeareduction_5%_yourprice,wemaystrikethedealwithyou.
Countersampleismadeby()whichcanhelpavoiddisputesoverthequalityofgoodsinthefuturetransaction.