【单选题】无力矩放大作用,接收误差稍大,负载能力较差的自整角机是()式自整角机。
【简答题】She wished to get well and go back to school soon. She hoped that ______ get well and go back to school soon.
【简答题】自由运动是动物区别于其他生物的重要特征之一。动物的运动具有一定的结构基础。对此请分析回答: (1)蚯蚓没有骨骼,在运动时,____________的末端可与环境粗糙表面接触,以有所支撑,与肌肉协调作用完成运动。____________使蚯蚓运动灵活、自如、转向方便。 (2)通过探究鱼鳍在游泳中的作用可知:与身体平衡有关的三种鳍是____________,既可以决定运动方向,又能产生前进动力的鳍是_...
【单选题】She hoped that some resolution of Edward's and some ______ of their friends would arise to assist their happiness.
【单选题】She believed that she was born to be a film star.