A:需要
B:自尊
C:自信
D:心理
-6____+5
−58 ____-0.625
下列说法中正确的个数是( )(1)一组对边平行的四边形是梯形; (2)等腰梯形的对角线相等;(3)等腰梯形的两个底角相等; (4)等腰梯形有一条对称轴.
It is said that pandas ______ in our country year by year.