下列多项式可以用平方差公式分解因式的是[ ]
A.x2﹣y
B.x2+y2
C.﹣x2+y2
D.﹣x2﹣y2
答案:C
绿色植物在生态系统中的地位是()
A.消费者
B.分解者
C.传递者
D.生产者
If the decision by the Customs on the dispute over duty payment is not acceptable to the duty payer, the duty payer has the right to sue ______ the PeoPle's Court within 15 days of receipt of the decision.
A.in B.toC.on D.at