[填空题]
What is the apparent xqu;58vj+g8vm bi mihi;--cz weight oa3 bfsoao *a77f a 75-kg astronaut 4200 km from the center of the Earth's Moon in a space 3s aoaa7 *o7bfvehicle (a) moving at constant velocity,
(b) accelerating toward the Moon at 2.9 $\mathrm{~m} / \mathrm{s}^{2}$ ?
State the "direction" in each case.
参考答案: 空格1: 21±2%
空格2: towards the Moon
空格3: 200±2%
空格4: away from the Moon