—Look! Jane has ______ tense expression on her face.

—So she does. It seems that ______ news is true.

A．a ; /

B．a ; the

C．the; /

D．the; a

下列过程中，有电能转化为化学能的是[ ]

A．打手机

B．光合作用

C．电解水

D．点燃氢气