问题 问答题 简答题

什么叫制动空走时间和空走距离?

答案

参考答案:

当列车(机车)在运行中施行制动时,从制动开始到全列车闸瓦突然同时以最大压力压紧车轮的假定瞬间,这段时间就称为制动空走时间。此后的制动时间称为有效制动时间。在空走时间内所走行的距离称为空走距离制动空走时间的计算是通过专门试验和理论分析确定的,《列车牵引计算规程》规定:机车单机不分类型,其紧急制动空走时间均按2.5s计算。

阅读理解

Long March exhibit

The Shanghai History Museum is putting on exhibition to remember the Long March(长征) which took place 75 years ago. More than 220 photos and 40 other things are on show. All the exhibition is explained in Chinese. The show will end on November 20.

Time: 10:00 a.m.—4:00 p.m.

Address: 1286 Hongqiao Road

Ticket: 8 yuan for Chinese/15 for foreigners

Thai elephants

Eight elephants from Thailand are an attraction for visitors at Changfeng Park by riding bikes, playing basketball, dancing and blowing a musical instrument. The elephants give three shows a day at 9:30 a.m., 3:30 p.m. and 8:00 p.m. and there is an extra show at 1:30 p.m. at weekends. The show will end on November 15.

Address:189 Daduhe Road

Ticket:30—40

Dancing dolphins

Dolphins jumping from the water to touch a ball, dancing to music, kissing people and doing easy math problems, and seals and sea lions, also performing, have made a large part of the aquarium in Peace Park, which interests children greatly.

Hours: 10:30 a.m., 4:00 p.m., and 7:30 p.m.

Ticket: 20 yuan for adults and 10 yuan for children.

小题1:Where can one see the Long March exhibition?

A.In Shanghai History Museum.

B.In Changfeng Park.

C.In Peace Park.

D.On 189 Dahude Road.小题2:How many shows do the Thailand elephants give at weekends?

A.One

B.Two

C.Three

D.Four小题3:What may interest children very much in Peace Park?

A.Elephants playing basketball.

B.Dolphins dancing to the music.

C.Seals riding bikes.

D.Sea lions blowing instruments.小题4:How much should a child pay to go into Peace Park?

A.Five yuan.

B.Fifteen yuan.

C.Ten yuan.

D.Twenty yuan.小题5:Which of the following is true?

A.The Long March exhibition is explained in English.

B.The sea animals can work out difficult math problems.

C.Thai elephants’ shows can only be seen in the day.

D.The sea animals perform three times a day.

单项选择题 A1/A2型题