一列火车16:30从北京开车,17:45到达天津,从北京到天津用______时______分.
17时45分-16时30分=1时15分;
故答案为:1,15.
He was such __ good speaker that he held our attention every minute of __ three-hour lecture.
A./; the
B.a; /
C.a; the
D.a; a
严守纪律的要点是:服从领导,听从命令,遵守制度,保守机密。( )