在倒闸操作中若发生疑问时，不准擅自更改操作票，待向值班调度员或（）报告，弄清楚后再进行操作。
参考答案：值班负责人
阅读理解。
Tom is seven. He goes to school every day. The school is near his home. So he goes there on foot
and comes back home on time (准时). But today he is late. His mother asks him, "Whyare you late
today?" "I was in the teachers' office" "Why did you go to the teachers' office?" "Because my teacher
asked us a question in class. and nobody (没有人) could answer it but me" "It's good to answer the
teacher's questions " "But the question was 'Who put the ink (墨水) on my chair?'"
根据短文内容判断正(T)误(F)。
( ) 1. Tom lives near his school.
( ) 2. He goes to school and comes back home by bike every day.
( ) 3. Today Tom goes to school late.
( ) 4. Tom put some ink on the teacher's chair.
( ) 5. Tom is very naughty (调皮).
塔筒筒壁的混凝土验算等级不应低于( )。
A．C30 B．C25C．C20 D．C15
