单选题 小明毕业后被分配到打字室工作,可他对打字并不很在行.他制定了一个目标,每天午休抽出半小时练习打字,争取一个月内把速度提高15个字,最终达到每分钟2000字的速度,从而提高自己的打字水平.他的目标不符合SMART原则中的( )原则.Bob was assigned to work in a typing room after graduation, but he was not very good at typing. He set a goal to take half an hour off from his lunch break every day to practice typing, aiming to increase his speed by 15 words within a month, and eventually reach a speed of 2,000 words per minute, thereby improving his typing skills. His goal does not conform to the ( ) principle in the SMART principle