【单选题】关于消费者均衡点的下列看法中正确的有( )。
B.
消费者均衡点在理论上可以脱离预算约束线而存在;
D.
在消费者均衡点上,预算约束线与无差异曲线斜率的值相等
【单选题】—Do you like playing ________ basketball? —No, I don't like sports. I like playing ________ chess. [ ]
【单选题】In some cities it is very difficult to have a telephone _____ , and people have to wait a long time before they can get a phone.
【单选题】-What’s your hobby, Jack? -I like playing ______football, but I don’t like playing _____violin.
【单选题】串行异步通信的实现,必须做到( )。
B.
一块数据传送结束时,用循环冗余校验码进行校验
C.
以字符为传送信息的单位,按约定配上起始位、停止位和校验位
【单选题】I am playing _____________ trumpet (喇叭), but my brother is playing _____________ football. [ ]