As the smallest child of his family, Alex is always longing for the time _______ he should be able to be independent.
A：which
B：where
C：whom
D：when
甲、乙两物体做匀速直线运动，通过的路程之比是2：3，运动速度之比是2：1，则甲、乙运动的时间之比是 （ ）
与10°E正好相对的经线是（ ）
