为了确定主要构件在变形量为()允许挠度时的压力差反复作用下不发生损坏及功能障碍而进行的检测为反复变形检测。
A、20%
B、30%
C、40%
D、60%
参考答案:D
解方程:
(1)2x2=5x (2)m2+3m-1=0 (3)9(x+1)2-(x-2)2=0
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