电子商务的作用有( )(多选题).
4、Is ________ possible to take a 10-minute break during the meeting tomorrow morning(单选题).now.,.that.,.it 5、按份共有,又称分别共有,是指数人按应有份额(部分)对共有物共同享受权利和分担义务的共有。(判断题).对.错