位置开关的文字符号是()。 ["SQ","SA","SK","SB"]
清代汉学分为哪两派()。 ["吴派","浙派","皖派","陈派"]
西印度群岛何以得名?它在经济发展上有什么特色?
At the earliest indication of fire aboard your vessel, you must FIRST(). ["locate the fire","determine which type of fire is burning","sound the alarm","fight the fire"]
巴拿马运河为何被人们称为“联结两大洋的水桥”?它在世界航运和战略上有什么重要意义?
西印度群岛包括哪些范围?