一截面尺寸为300mm*400mm的梁、钢筋的最小净距为45mm、采用卵石的最大粒径为()mm。
A.20
B.45
C.31.5
D.50
参考答案:C
阅读理解。
Hai Di lived in a city in the north. He wanted to visit some places in the south, but he didn’t want to
spend too much money.
Last summer he had a short vacation. He decided to take a trip to Hainan. He talked to a friend about his plan, “If you go by plane, you’ll get there in a few hours. then you have more time for sightseeing. If
you go by train, it’ll take you four or five days to get there”.
He left in the middle of June and got back to work at the end of the month. It took him more than two weeks at the end of the month. It took him more than two weeks to make the trip. What’s the matter? He went by ship for most of the journey.
根据短文内容,判断正(T)误(F)。
( )1.Hai Di lives in a city in the south.
( )2.Hai Di had a short holiday last year.
( )3.The trip to the south took him over two weeks.
( )4.Hai Di came back in June.
( )5.It takes a few days to travel from the north to the south by plane.
小红家离学校500米,一天从家走到215米时发现忘了带数学书,又返回去拿书,再到学校.这天小红上学共走了______米.