按企业在社会再生产过程中所处的环节不同,可以将企业分为()。
A.生产企业
B.工业企业
C.交通企业
D.流通企业
参考答案:A, D
-Do you know the boy________ is sitting next to Peter?
-Yes. He is Peter's friend. They are celebrating his ________ birthday.
A.who; ninth
B.that; nineth
C./; nineth
D.which; ninth
通用式机车信号接线盒使用的熔丝容量为多少?