【简答题】听下面一段材料,回答第1-4小题。 1. How many persons were there in the room when someone was knocking at the door? [ ] A. One person. B. Two persons. C. Three persons. 2. What did the young man wear? [ ] A. ...
【简答题】听材料,回答问题。 1. How many persons are going to see Betty off at the airport? [ ] A. Only one. B. Two. C. Three. 2. Where will Betty stay in Guangzhou? [ ] A. In a hotel. B. In her brother's home. ...
【简答题】Two persons start
from the same location O and walk around a square in opposite
directions with constant
speeds. The square is 30m by 30m. A’s speed is 2m/s and B’s speed is 1m/s. Find the coordinates...