原式=9-（2-1）+1+2-1
=10．
人生而平等。因此，人与人之间不能存在差异。 [ ]
A terrible earthquake ______ in Lushan County, Sichuan Province,______ about 200 people.
A．took place ; killing
B．was taken place; killing
C．took place; killed
D．was taken place; killed
