皮皮学，免费搜题
登录
搜题
【单选题】
某化工厂用一热交换器,每小时冷凝3.4t.h-1工业酒精。已知酒精温度80°C,汽化潜热为1072kJ.kg-1,酒精蒸汽在冷凝,测得其α0=2268w.m-2.K-1,冷却水在流动,水流速度为0.4 m.s-1,进口水温度为20°C,流量为34500kg.h-1, 钢管规格:φ30×2.5mm,长2m,钢管导热系数46.5w.m-1.K-1,设过程无热损失,并忽略垢层热阻,试求流体的平均温度差△tm=( ) °C。 (水的ρ=1000kg.m-3 , Cp=4.18kJ.kg-1.K-1, μ=1cp, λ=0.65w.m-1.K-1)
A.
47.37
B.
40
C.
50
D.
37.5
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】She froze with fear. He's driving me crazy. Simile Metaphor Hyperbole Personification
 C extreme exaggeration Personification Hyperbole Simile Metaphor
 B
A.
Metaphor
B.
Personification
C.
Simile
D.
Hyperbole
查看完整题目与答案
【单选题】Is the comparison in line six a simile or metaphor?
A.
simile
B.
Metaphor
查看完整题目与答案
【单选题】A metaphor is a poetic device that deals with comparison. It compares similar qualities of two dissimilar objects. With a simple metaphor, one object becomes the other: Love is a rose.Although this do...
A.
A comparison between two different objects with similar features.
B.
A contrast between two different things to create a vivid image.
C.
A description of two similar objects in a poetic way.
D.
A literary device specially employed in poetry writing.
查看完整题目与答案
【简答题】金属材料的基本性能包括强度指标，分为（）、（）、（）或（）、硬度、（）等指标。
查看完整题目与答案
【判断题】接近觉传感器用接近觉可感知对象物体在附近,从而使手臂减速慢慢靠近物体。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Which of the statements is NOT correct about metaphor?
A.
Unlike simile, metaphor does not contain the words “like” or “as.”
B.
Metaphor is an implicit comparison between things that are essentially different yet have something in common.
C.
Metaphors make it clear and obvious that you are comparing something to something else.
D.
none of the above
查看完整题目与答案
【简答题】材料基本性能包括______、______。
查看完整题目与答案
【单选题】金属材料的基本性能包括:( )物理性能、化学性能和工艺性能。
A.
导热性
B.
磁性
C.
焊接性能
D.
机械性能
查看完整题目与答案
【单选题】当车辆发送火灾后,如果火势很大,采用的施救方法为
A.
自行灭火
B.
报警求救
C.
发动随车人员
D.
求救周边人员
查看完整题目与答案
【简答题】模具材料的基本性能包括 和 。 使用性能的强度主要包括 和
查看完整题目与答案
相关题目：
【单选题】She froze with fear. He's driving me crazy. Simile Metaphor Hyperbole Personification
 C extreme exaggeration Personification Hyperbole Simile Metaphor
 B
A.
Metaphor
B.
Personification
C.
Simile
D.
Hyperbole
查看完整题目与答案
【单选题】Is the comparison in line six a simile or metaphor?
A.
simile
B.
Metaphor
查看完整题目与答案
【单选题】A metaphor is a poetic device that deals with comparison. It compares similar qualities of two dissimilar objects. With a simple metaphor, one object becomes the other: Love is a rose.Although this do...
A.
A comparison between two different objects with similar features.
B.
A contrast between two different things to create a vivid image.
C.
A description of two similar objects in a poetic way.
D.
A literary device specially employed in poetry writing.
查看完整题目与答案
【简答题】金属材料的基本性能包括强度指标，分为（）、（）、（）或（）、硬度、（）等指标。
查看完整题目与答案
【判断题】接近觉传感器用接近觉可感知对象物体在附近,从而使手臂减速慢慢靠近物体。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Which of the statements is NOT correct about metaphor?
A.
Unlike simile, metaphor does not contain the words “like” or “as.”
B.
Metaphor is an implicit comparison between things that are essentially different yet have something in common.
C.
Metaphors make it clear and obvious that you are comparing something to something else.
D.
none of the above
查看完整题目与答案
【简答题】材料基本性能包括______、______。
查看完整题目与答案
【单选题】金属材料的基本性能包括:( )物理性能、化学性能和工艺性能。
A.
导热性
B.
磁性
C.
焊接性能
D.
机械性能
查看完整题目与答案
【单选题】当车辆发送火灾后,如果火势很大,采用的施救方法为
A.
自行灭火
B.
报警求救
C.
发动随车人员
D.
求救周边人员
查看完整题目与答案
【简答题】模具材料的基本性能包括 和 。 使用性能的强度主要包括 和
查看完整题目与答案