.1、定义或解释说明 1. be 2.be called 3. means 4. be defined as 5.refer toWe can feel acceleration, which is an increase in speed. But we notice it for only a short time. For example we feel it during the takeoff run of an airplane. 1. the underlined word acceleration means _. A. any kind of movement B. the movement of a plane C. a steady speed D. to make something mover faster2、对比关系1. but/however/yet/while 2. otherwise/or/or else 3. instead of 4.alt
