Shenzhou-VIII has docked with Tiangong-I successfully, ________ the start of the establishment of China’s own space station．

A．marked

B．to mark

C．marking

D．having marked

不属于石化行业职业病的是（）。

A、佝偻

B、尘肺病

C、刺激性物质引起的皮炎

D、电光性眼炎