下列哪一项是发现巨大血小板综合征的最简便试验（）

A.血涂片上体积巨大（如小淋巴细胞）的血小板>50%

B.体内外血小板黏附试验减低

C.血小板聚集试验正常，但对Ristocetin无反应

D.单克隆抗体（AN51，SW2）证实缺乏GPIb

E.血小板第3因子（PF3）有效性升高

whatever great achievements the future may have in store for China, ______ is likely that many of them will be born in Zhongguancun.

A．it

B．which

C．she

D．that