She was born ______ the morning of December fifth. [ ]
A. in
B. at
C. on
答案：C
运输公司要运一批货物，用载重4.5吨的汽车去运，正好5次运完。如果用载重3.2吨的汽车去运，需要运多少次？
摄氏温度单位“摄氏度”与热力学温度单位“开尔文”相等。
