在铁路主要技术标准中属于固定设备标准的项目包括()。
A、正线数目
B、最小曲线半径
C、限制坡度
D、机车交路
E、闭塞类型
参考答案:A, B, C
—Hi, Susan, where were you at lunch time?I ________ a seat for you in the coffee shop.
—Oh, sorry to miss you.My political science class ran longer than usual.
A.am saving
B.was saving
C.had saved
D.have saved
大叶性肺炎多见于
A.青壮年B.老年人C.婴幼儿D.青少年E.以上都是