—Are those his books?
—Yes, __________.
A:those aren't
B:those are
C:they are
D:they're
根据句意及汉语提示完成单词。
水的比热容是4.2×103J/(kg•℃),将质量为10kg的水从30℃加热到80℃,需要吸收的热量是 ____ J,如果将水倒去14后,剩余水的比热容为 ____ J/(kg•℃).