—Would you like to visit the Science Museum with us,Jack?

—            , but surfing the Internet seems more interesting.                     [ ]

A. I'd love to                    

B. That's OK

C. You're welcome                

D. No problem

下列物质中硫元素化合价最低的是 [ ]

A. H₂S

B. H₂SO₃

C. S

D. H₂SO₄