题目

有关纬线和纬度的说法，正确的是（   ）A、所有纬线长度相等                           B、纬线指示东西方向 C、两条相对的纬线构成一个纬线圈          D、所有纬线长度不等 答案： B —I wonder       . —Zebras.A．what do they call these animalsB．how they call these animalsC．what they call these animalsD．how do they call these animals