下面对union的描述正确的是()A.union只连接结果集完全一样的查询语句B.union可以连接结果集中数据类型个数相同的多个结果集C.union是筛选关键词，对结果集再进行操作D.任何查询语句都可以用union来连接

By 1992 the European Union had become a full-fledged A: Economic union B: Monetary union C: Common marcket D: Fiscal union

At present, the European Union is __________ . A: a free trade area B: a customs union C: a common market D: an economic union

The Maastricht Treaty of 1991 established a blueprint for economic union and monetary union for European Union members.

1. The European Union is best described as a _______________ . A: free trade area B: customs union C: common market D: economic union

以下共用体定义错误的是（） A: union{ int i;char ch;float f;}a,b,c; B: union data{int i;char ch;float f;} C: union data{int i; char ch;float f;}union data a,b,c; D: union data{ int i;char ch;float f;};union dataa,b,c;

中国大学MOOC: The federal union is a union of people in which ___________.

“学生会”的英文表达 A: students' meeting B: The Studengts C: The Students’ Union D: the union

The word "shotgun marriage with China" in paragraph 5 could be explained as ______. A: come to an union after bitter wars. B: a kind of union betraying the willing of both countries. C: a kind of union forced by others. D: a kind of union forced by one of the two countries.

As of 1992, the European Union had achieved the monetary union stage of economic integration.