如图,△ABC的内接正方形EFGH中,EH∥BC,其中BC=4,高AD=6,则正方形的边长为____ .
The mountain I visited last Sunday isn't very ___________. Few ___________ go sightseeing there.
读诗《游山西村》判断下列说法的正误。
“丰年留客足鸡豚”的“足”写出了农家待客的热情。