Weare_______acopyofourcatalogueforyourreference.

各国对国际仲裁和国际商事仲裁裁决的承认与执行，无需规定任何条件。()

ThecreditofletterwillbeconfirmedbytheBankofChina,Shanghai,thatwill_______yourdraftonthedocumentsatsightfortheamountofyourinvoice.

与从价税相比，从量税()

设X1，X2，,，Xn，,是独立同分布的随机变量序列，E(Xn)=μ，D(Xn)=σ2，n=1,2，,,则=_________.