汉武帝为了加强中央集权,在经济上采取的措施是()①收归铸币权②收归土地所有权③收归盐铁经营权④抵制商业发展
A.①③
B.②④
C.①②③
D.②③④
参考答案:A
以下哪种是包交换?协议?()
A、帧中继
B、PPP
C、HDLC
D、ISDN
—We need a person badly to think up such an idea .
— the new comer have a try ?
A.Shall
B.May
C.Should
D.Need