运输易燃气体途中遇有火情须迅速扑救,应将未着火的气瓶迅速移至安全处;对巳着火的气瓶应使用大量____喷洒在气瓶上,使其降温冷却。
A.雾状水
B.热水
C.碱性水
参考答案:A
已知y=f(x)在定义域R上是减函数,且f(1-a)<f(2a-1),则a的取值范围是______.
Lucy is famous her dancing in her class. [ ]
A. as
B. on
C. for
D. in