—Your grandparents were very great.                           

—Yes. They supported my father’s schooling ______ they were very poor.

A．as if

B．even though

C．so that

D．what if

溶胶有三个最基本的特性，下列哪点不在其中？（）

A.高度分散性

B.热力学稳定性

C.多相性

D.热力学不稳定性