一种在心血管外科、脑外科、断肢再植、器官和组织移植等实验外科上广泛使用的动物是（）
A、兔
B、狗
C、猫
D、猴
参考答案：B
Food, gas and vegetables have been ________ by rail directly to the city ever since the highways
were blocked. [ ]
A. preferred
B. transported
C. packed
D. rescued
公司级的安全培训教育时间不得少于10小时。
