【判断题】Writers should be careful to give only good characteristics to their protagonists.
【单选题】---Be careful, don’t forget to follow your father. ---I know that, Mum. One can never be too careful.
【判断题】对于有界地层不稳定渗流,压力波传播第一阶段即压力波传到边界之前的阶段相当于无限大地层稳定渗流。
【单选题】Be careful to move the equipment --- ______ it gently.