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

专业技术人员应当具有丰富的知识，知识面要宽，专业知识要扎实，要能够做到百问不倒。说明专业技术人员应具备的能力是（）。

A.渊博的知识

B.正确的动机

C.解放的思想

D.顽强的性格