()就是生产物流流量的均衡,这是杜绝生产中浪费现象的重要措施。
A．企业物流
B．均衡生产
C．控制库存
D．生产物流
参考答案：B
His work _____ have been completed; otherwise, he wouldn’t be enjoying himself on the beach.
A．should
B．shouldn’t
C．can’t
D．must
我国成人肠梗阻最常见的原因是
A．肠扭转B．腹内疝C．肠粘连D．肠套叠
