叉车的动力装置是（）。
A、电动机
B、液压泵
C、发动机
D、喷油泵
参考答案：C
Passage One
What happened to Jamaica’s sugar factories in the 1990s a. They witnessed unsuccessful reforms. b. They went bankrupt due to crop failure. c. They suffered from inefficient production. d. They failed due to a shortage of labor supply.
市场是以（）为基础的交换瓜葛的总和。
A、社会分工
B、商品交换
C、经济贸易
D、利益分配
