__________your brother?
A:That's
B:That is
C:Is that
D:Is that's
已知数据是1,5,6,5,5,6,6,6,则下面结论正确的是( )
北回归线自西向东依次经过的省级单位是( )
按照从微观到宏观顺序写出动物体的结构层次:____