企业间的物流信息一般采用()标准。
A.编制条形码
B.扫描
C.拷贝
D.电子数据交换
参考答案:D
It is often that human beings are naturally equipped to speak.
A.said
B.to say
C.saying
D.being said
试压坑内有人时是否可以吊动防喷器?为什么?