.

An official said the plan had also taken migrant workers into account, ________ medical care would be provided even if they didn’t have a stable job.

A．for whom

B．for which

C．with whom

D．with which

下列四组物质中，均属于氧化物的是

A．氧气、氧化钙、四氧化三铁

B．水、二氧化硫、高锰酸钾

C．冰水混合物、氧化铜、氧化汞

D．一氧化碳、氧化镁、二氧化锰