什么是液力传动？什么是液压传动？
参考答案：
利用液体动能的变化传递功率的称为液力传动，利用液体的压力来传递功率的称为液压传动。
Some of the objectives of the Grammar-Translation Method are（） and to train a better understanding of the first language.
A. to help students read literature
B. to make students exercise move
C. to provide students with good mental exercise
D. to have learners listen and speak more
