题干
The heavy snow didn't the international airlines.
A：pay attention to
B：add to
C：make a difference to
D：keep to
答案(点此获取答案解析）
C
The heavy snow didn't the international airlines.
A：pay attention to
B：add to
C：make a difference to
D：keep to
2C(g)，当平衡向正方向移动时，下列说法一定正确的是