政府机关、企业、社会团体等单位为完成某项工作，约束某类工作人员的行为准则的文书是
A．规定
B．守则
C．意向书
D．通知
参考答案：B
I called Mary many times yesterday evening, but I couldn't get through. Her brother _____ on the
phone all the time! [ ]
A. was talking
B. has been talking
C. has talked
D. talked
目前有些城市对汽车实行分类牌照进入市区，其目的是
A．抑制私人出租车
B．优先发展公交车
C．改善城市交通拥挤状况
D．减少就业压力
