四年级上册英语课件- unit 1 signs 北师大版（三起） (共13张ppt).pptx
课件13张PPT。 Signs
signs 标志
There are a lot of signs here.
They mean different things .
他们表示不同的意思．No smokingDon't touchNo foodNo litteringNo parkingDanger!Look and answer
看图，分别说说以下标志的含义
What does it mean?Danger!No swimming!Put the signs in the blanks.on a bus:in a labrary:in a m...