1947年10月10日，中国人民解放军总部发表宣言，正式提出______的行动口号。

A．前方打老蒋

B．打倒蒋介石

C．解放全中国

D．后方挖蒋根

此题为多项选择题。

Before 1500 North America was inhabited by more than 300 cultural groups, each with different customs, social structures, world views, and languages. Such diversity ______ the existence of a single Native American culture.

A．complements

B．implies

C．reiterates

D．argues against

安装工程预算定额基价是由（）三部分组成。

A、定额人工费工

B、定额材料费

C、定额机械台班费

D、管理引见

For many young people during the Roaring Twenties, a disgust with the excesses of American culture ______ a wanderlust to provoke an exodus abroad.

A．overwhemed

B．reflected

C．combined with

D．hindered

He gradually ______ that her parents had been right and his decision had to be modified.

A．perceived

B．pioneered

C．plagued

D．transformed

几个对象共同包围着一个空间，容易被感知为一个整体，符合知觉的()

A．接近原则

B．相似原则

C．闭锁原则

D．连续原则