一次函数的图象经过第二，三，四象限，它的函数关系式可写成______（只要任写一个即可）．
由题可知函数关系式只要满足k＜0，b＜0即可，例如y=-x-1．
溶液型软膏
A．油脂性基质B．水溶性基质C．栓剂基质D．乳化剂E．气雾剂的抛射剂
See the flag on top of the building? That was _____ we did this morning.[ ]
A. when
B. which
C. where
D. what
