以下电信收费方式中,()属于定额资费。
A.收入网费和使用费的移动电话资费
B.收月租费和使用费的固定电话资费
C.每条o.1元的短信息发送费
D.包月制电话费
参考答案:D
用脚踢足球时,脚给足球一个力,同时感到疼痛,这个事实说明了物体间力的作用是______的.
A: Excuse me, Mr. Smith, but are you free this eveningB:().
A. Well, I’m afraid whether I will be free or not has little to do with you.
B. Yes, welcome to my home this evening.
C. Sorry, I don’t like to be asked such a private question.
D. I’m sorry , I have an appointment at seven.