以下不属于公司实力介绍的内容是( )。A．公司的背景与机构B．公司的资源情况C．公

Who           to learn a new song? [ ]

A. wants                           

B. want                           

C. want's

________ earthquake in Japan on March 11^th, 2011 is ________ great shock not only to the Japanese people but also to people all over the world.

A．The; the

B．The; a

C．An; a

D．An; the

一只空瓶质量是0.2kg，装满水后质量为1.0kg；倒掉水后再装另外一种液体，总质量变为1.64kg，求这种液体的密度是多少？