题干
—What's your New Year's resolution, Dave?
—I'm going to exercise more _______.
A：keep fit
B：keeping fit
C：to keep fit
D：keeps fit
答案(点此获取答案解析）
C
—What's your New Year's resolution, Dave?
—I'm going to exercise more _______.
A：keep fit
B：keeping fit
C：to keep fit
D：keeps fit
中1 mol H－O键形成时放出热量463 kJ，则氢气