等腰三角形两边长分别为4和8,则这个等腰三角形的周长为( )
A:16
B:18
C:20
D:16或20
—We all went to the park except you last weekend. Why didn't you come?
—Because I the park twice.
缩句
从图中可以看出,我国海军舰艇编队从海南三亚出发去亚丁湾、索马里海域护航,必须经过的海峡是( )
1042-3315÷51=____