____________ people went to the concert which was held in People’s Square the night of May Day.

A．Three thousand, in

B．Thousands, on

C．Many thousand, in

D．Thousands of, on

划破试验用于（）

A.检查被试者对某种物质发生Ⅰ型变态反应

B.检查被试者对某种物质发生Ⅱ型变态反应

C.检查被试者对某种物质发生Ⅲ型变态反应

D.检查被试者对某种物质发生Ⅳ型变态反应

E.以上都不是