ANSI的高级数据通信控制规程ADCCP是 ( )
A．面向字符型的同步协议
B．面向比特的同步协议
C．面向字计数的同步协议
D．异步协议
参考答案：B
(2013·江西十所重点中学高三二模)Many people headed for the water to ________， including rivers, bays in the seaside of the country.
A．put off
B．cut off
C．pull off
D．cool off
平均红细胞容积正常参考值
