用助听器后不能听到鸟叫声,不可以()
A
暂无解析
要约只有传达到受约人处方为有效。()
The shipment time is June or July at our _____ and the goods will be shipped in one_____.
国际合作生产的主体是()。
设二维随机变量 (X,Y)的概率密度为 f (x,y)=则 P{ X+Y≤1} = _________.
Your delay in shipment will______ us in great difficulty.