A:宪法是一切组织和个人的根本活动准则
B:普通法是宪法的具体化
C:宪法是所有法律的总和
D:宪法具有最高法律效力
根据短文选择正确答案
Today is a holiday. Sam is playing football in the park. Amy is playing the guitar(吉他)under the tree. Daming is flying a kite. Lingling isn't here. She visits her grandma today. The children are playing merrily. They think life is like a dream.
如图,已知两正方形的面积分别是25和169,则字母B所代表的正方形的面积是( )