在进行疲劳强度计算时,其极限应力应为材料的() A.屈服点 B.疲劳极限 C.强度极

题型:单项选择题

问题:

在进行疲劳强度计算时,其极限应力应为材料的()

A.屈服点

B.疲劳极限

C.强度极限

D.弹性极限

考点:机械设计基础机械设计基础题库
题型:单项选择题

Events

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 yuan 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 yuan

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(水族馆) 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.

题型:单项选择题

余秋雨2001年在其文章《扼守秋天》中写道:“英国也许因为温和渐进,容易被人批评为不深刻。但是,社会发展该做的事人家都做了,该跨的坎人家都跨了,该具备的观念也──具备了,你还能说什么呢?”从政治制度的演变来看,英国曾经“做了”“ 跨了”什么

①1832年议会选举改革 ②1688年的“光荣革命”    

③1689年《权利法案》的颁布 ④责任制内阁的形成    [ ]

A.①②③       

B.①②④         

C.①③④         

D.①②③④

题型:单项选择题

病历摘要:患者男性,65岁,既往有高血压病史10余年。因剧烈胸痛5小时入院,伴出冷汗,呕吐2次。查体:血压90/60mmHg,四肢湿冷。心率45次/分,可闻及S4,胸骨左缘第3肋间可闻及3/6级舒张期哈气样杂音。患者的完整诊断为()。

A.冠心病

B.急性心肌梗死

C.心源性休克

D.主动脉瓣关闭不全

E.二尖瓣关闭不全

F.心功能KillipⅣ级;高血压病

题型:单项选择题

特别行政区不同于中国其他一般省区,它享有高度的()。

A.外交权

B.国防权

C.自治权

D.独立权

题型:单项选择题

利用炸药爆炸产生的()使坯料成形的方法是爆炸成形。

A、高压

B、高温高压

C、冲击波

D、气流

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