发展中国家的经济发展取得了哪些成就?面临哪些问题?
A shroud is().
A. any wire running fore-and-aft on a ship
B. any wire with a fiber core
C. a heavy wire extending from the trunk of the mast to the head of the boom
D. a heavy wire extending from the mast,atwartships to the deck,to support the mast
白兰地能称为干邑的条件是()
A. 必须用法国POMEROL地区的葡萄为原料
B. 必须用法国COGNAC地区的葡萄为原料
C. 必须用德国莱茵地区的葡萄为原料
D. 以上全选