【单选题】North points up, south points ____________. [ ]
【简答题】听音填空。 1. _____________ points up. 2. _____________ points down. 3. _____________ points left. 4. _____________ points right. 5. Look at this _____________.
【单选题】West points left. East points _____________. [ ]
【判断题】明代安装了中国第一架田文望远镜,名为“筩”。
【单选题】The underlined words “tipping points” most probably refer to