题干
Charlie Chaplin was loved by all who watched the film for his determination _____
overcoming difficulties.
A：to
B：with
C：i
D：o
答案(点此获取答案解析）
C
A：to
B：with
C：i
D：o
2SO3(g)，△H<0。在一定条件下达到平衡状态，时间为t1时改变条件，反应速率与时间关系如图，下列说法正确的是