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【单选题】
楼盖混凝土强度等级应大于( ),为了避免和减小楼盖混凝土收缩裂缝,其强度不宜过高,跨度较大时一般宜采用C30。A.
C15
B.
C20
C.
C25
D.
C30
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皮皮学刷刷变学霸
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【判断题】《关于动车组票价有关事项的通知》（铁运电[2007]75号）规定，动车组二等座车公布票价打折时，70公里及以下运价里程的动车组不进行任何形式打折优惠，一律按公布票价执行。
A.
正确
B.
错误
【单选题】Many boys like _______ because it's exciting．
A.
play soccer
B.
playing soccer
C.
play the soccer
D.
playing the soccer
【简答题】用海明码校验 4 位的信息码,则校验码的长度至少为( )位
【单选题】—He didn't go to school late yesterday, did he? —________, though it rained hard yesterday.
A.
No, he didn't
B.
Yes, he didn't
C.
Yes, he did
【单选题】The little boy walks ____ he _____ an old man. A. as if, likes B. as though, were c. even if, li
A.
12. The little boy walks ____ he _____ an old man. A. as if, likes
B.
as though, were c. even if, likes D. even though, were
【判断题】《关于动车组票价有关事项的通知》（铁运电[2007]75号）规定，按列车开行日期，至少提前5天在车站营业场所向旅客公布点到点公布票价，不公布价率。
A.
正确
B.
错误
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