肠梗阻的主要病理生理变化是（）

A.肠膨胀和肠坏死

B.体液丧失

C.电解质紊乱

D.感染和毒素吸收

E.以上都是

Online shopping is increasingly popular；by September 2011，the total daily sales at Taobao______ had amounted to 935  million yuan，which had even overtaken the daily total sales of Hong Kong.

A．just

B．only

C．merely

D．alone