在地球仪上，与赤道平行的线叫[ ]
A、经线
B、纬线
C、0°
D、180°
答案：B
The computer is very useful in our life, ________it? . [ ]
A. isn't
B. wasn't
C. hasn't
D. doesn't
地球仪上，与赤道平行的线叫[ ]
地球仪上，与赤道平行的线叫[ ]