A:日晷-水钟-摆钟
B:摆钟-日晷-水钟
C:水钟-摆钟-日晷
In severe weather,traffic is restricted________certain roads that have been cleared of snow.
如图所示,小芳用画正方形的办法画出下列一组图案,你能按规律继续画下去吗?想想其中有哪些相似图形?