皮皮学，免费搜题
登录
搜题
【简答题】
2010年4月26日，新型高速列车“和谐”号动车组开始驰骋在福厦铁路线上，从而闽西南形成“一小时经济圈”，福厦间各设区市的“2小时交通圈”。如图所示的动车组由5节车箱组成，车组总功率为6000kW，最大牵引功率为4800kW，最大行驶速度为250km/h。 （1）当该车组用最大牵引功率以最大速度在轨道上匀速行驶3min，通过的路程是多少？在这个过程中车组受到的阻力是多少？ （2）为保证车组正常行驶，每节车箱上供乘客饮的电热水器耗电功率不能超过2800W。一节车箱内的电热水器5min最多可产生多少热量？如果热效率为80%，问这些热量可以使多少千克的矿泉水温度从20℃升高到50℃？（c 水 =4.2×10 3 J／（kg·℃）） （3）仔细观察车头的外形，请你谈谈这样设计的好处。
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【单选题】---So sorry, I took your school T-shirt by mistake. But where is ___? ---Don ’ t worry. Let me help you find it.
A.
yours
B.
his
C.
mine
查看完整题目与答案
【简答题】Hiding from the rain and snow. Trying to (1) but I won't let go . Looking at a (2) _______ street Listening to my own heart beat . So many people all around the world . Tell me where do I (3) someone ...
查看完整题目与答案
【多选题】回族的传统节日主要有( )
A.
开斋节
B.
春节
C.
古尔邦节
D.
中秋节
E.
圣纪节
查看完整题目与答案
【简答题】按照听到的对话内容，听下列句子排序，将序号写在括号内。 (     ) Well, young man. Let me see your throat. (     ) There's nothing wrong with you. (     ) I just came to get a bottle of medicine for my mother. (     ) I know there...
查看完整题目与答案
【多选题】P—Passenger  旅客               T—Ticket agent  售票员 P: Excuse me, but can you help me? T: P: Now, my wife has bought this HSR ticket. But because of some urgent business to deal with, she has to stay he...
A.
2
B.
4
C.
1
D.
5
E.
3
查看完整题目与答案
【单选题】下列与开办药品经营企业必须具备的条件不符的是( )
A.
具有保证所经营药品质量的规章制度
B.
具有与所经营药品相适应的质量管理机构或者人员
C.
具有依法经过资格认定的药学技术人员
D.
具有与所经营药品相适应的场地规模
查看完整题目与答案
【简答题】阅读理解。 Can you creat your own T-shirt? Let me tell you it's easy! In the modern world, designing a personal T-shirt with your own message or favorite image (图像) is now a piece of cake. At first, you ca...
查看完整题目与答案
【单选题】There is no need to tell me your answer now. Give it some ______ and then let me know.
A.
thought
B.
support
C.
protection
D.
authority
查看完整题目与答案
【简答题】A boy who was cleaning shoes in the street said to a young man, “Let me clean your shoes.” The young man said, “No, thank you.” “You may pay(支付) me only one dollar for them.” Said the boy. But the you...
查看完整题目与答案
【简答题】根据已给出的首字母，补全单词，完成邮件。 Dear Ann: I w__________ glad to read your e-mail. Now let me tell you something about m__________ field trips. We are going to go on s__________ field trips this year. We h_______...
查看完整题目与答案
相关题目：
【单选题】---So sorry, I took your school T-shirt by mistake. But where is ___? ---Don ’ t worry. Let me help you find it.
A.
yours
B.
his
C.
mine
查看完整题目与答案
【简答题】Hiding from the rain and snow. Trying to (1) but I won't let go . Looking at a (2) _______ street Listening to my own heart beat . So many people all around the world . Tell me where do I (3) someone ...
查看完整题目与答案
【多选题】回族的传统节日主要有( )
A.
开斋节
B.
春节
C.
古尔邦节
D.
中秋节
E.
圣纪节
查看完整题目与答案
【简答题】按照听到的对话内容，听下列句子排序，将序号写在括号内。 (     ) Well, young man. Let me see your throat. (     ) There's nothing wrong with you. (     ) I just came to get a bottle of medicine for my mother. (     ) I know there...
查看完整题目与答案
【多选题】P—Passenger  旅客               T—Ticket agent  售票员 P: Excuse me, but can you help me? T: P: Now, my wife has bought this HSR ticket. But because of some urgent business to deal with, she has to stay he...
A.
2
B.
4
C.
1
D.
5
E.
3
查看完整题目与答案
【单选题】下列与开办药品经营企业必须具备的条件不符的是( )
A.
具有保证所经营药品质量的规章制度
B.
具有与所经营药品相适应的质量管理机构或者人员
C.
具有依法经过资格认定的药学技术人员
D.
具有与所经营药品相适应的场地规模
查看完整题目与答案
【简答题】阅读理解。 Can you creat your own T-shirt? Let me tell you it's easy! In the modern world, designing a personal T-shirt with your own message or favorite image (图像) is now a piece of cake. At first, you ca...
查看完整题目与答案
【单选题】There is no need to tell me your answer now. Give it some ______ and then let me know.
A.
thought
B.
support
C.
protection
D.
authority
查看完整题目与答案
【简答题】A boy who was cleaning shoes in the street said to a young man, “Let me clean your shoes.” The young man said, “No, thank you.” “You may pay(支付) me only one dollar for them.” Said the boy. But the you...
查看完整题目与答案
【简答题】根据已给出的首字母，补全单词，完成邮件。 Dear Ann: I w__________ glad to read your e-mail. Now let me tell you something about m__________ field trips. We are going to go on s__________ field trips this year. We h_______...
查看完整题目与答案