【简答题】Translate the following expressions into Chinese 1. be attached to... 2. exploratory behavior 3. on occasion 4. parental duties 5. throw light on 6. an ultimate purpose 7. desired action 8. desirable...
【简答题】A child rolls a marble on a bent track that is 100 cm as long as shown in the following Figure. We use x to represent the position of the marble along the track. On the hor izontal sections from x = 0...