物体在平面镜里成______像，像和物体大小______．
根据平面镜成像的特点，其中所成的像是等大正立的虚像．故答案为：虚，相等．
— Can I have ________cakes, please?
— Sorry, I don’t have ________cakes in my fridge.
A．some, any
B．any, any
C．any, some
D．some, some
置换管道末端应配备气体含量检测设备，当置换管道末端放空管口气体含氧量不大于（）%时即可认为置换合格。
