(____)1. A. school B. plane C. ship
(____)2. A. take B. pick C. train
(____)3. A. skate B. book C. jump
(____)4. A. near B. why C. who
(____)5. A. clothes B. prince C .fairy
——Your father was worried about something this morning. Why?——He wondered .
下列说法中正确的是()
过去常用水作冷却剂给汽车的发动机降温,这是利用了水的比热容较____的性质,某汽车水箱中装了8kg的水,发动机运行一段时间后,水温升高了20℃,在这个过程中,水吸收的热量是____J,水的比热容为4.2×103J/(kg•℃).