皮皮学，免费搜题
登录
logo - 刷刷题
搜题
【单选题】
蒸汽压缩制冷循环的性能与制冷剂的热力学性质密切相关,下列哪个条件不符合制冷剂选择要求
A.
沸点低
B.
冷凝压力低
C.
汽化潜热大
D.
较低的临介温度
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案：
举一反三
【简答题】(a) What is the wavelength of an X-ray photon of energy 10.0 keV? (b) What is the wavelength of a gamma-ray photon of energy 1.00 MeV? (c) What is the range of energies of photons of visible light wit...
查看完整题目与答案
【单选题】根据物质流动是否主要由人类活动引起可分成（ ）两类The material flow can be divided into the following（ ）two categories according to whether the material flow is mainly caused by human activity
A.
物质生物地球化学流动和人为流动 Material biogeochemical flow and its anthropogenic cycle
B.
物质随大气流动和随水体流动 Material flowing with the atmosphere and with the water body
C.
物质工业流动和农业流动 Material industrial and agricultural flows
D.
物质产业流动和消费流动 Material industry flow and consumption flow
查看完整题目与答案
【单选题】The de Broglie wavelength of an electron with kinetic energy of 100 keV is ( )
A.
3.702 pm
B.
3.702 nm
C.
3.702 fm
D.
3.702 mm
查看完整题目与答案
【单选题】It has been predicted that AI can replace human in every activity in ________.
A.
2021
B.
2031
C.
2051
D.
2061
查看完整题目与答案
【单选题】The wavelength of an EM wave is 0.44 μm, then what is its frequency?
A.
6.82e10 Hz
B.
0.15e(-14) Hz
C.
6.82e5 GHz
D.
1.32e2 Hz
查看完整题目与答案
【单选题】Due to factors like geographic position, atmospheric circulation, _______ and human activity, China can be divided into three climate zones.
A.
temperature
B.
altitude
C.
longitude
D.
precipitation
查看完整题目与答案
【单选题】The wavelength of an electron whose velocity is 1.7 × 10 4 m/s and whose mass is 9.1 × 10 -28 g is __________ m.
A.
4.3 × 10 -11
B.
12
C.
4.3 × 10 -8
D.
2.3 × 10 7
E.
2.3 × 10 -7
查看完整题目与答案
【单选题】Packaging is an activity closely associated with the revolution of society and , can be __ to human beginning .
A.
traced back
B.
come back
C.
tracked back
D.
gone back
查看完整题目与答案
【单选题】The wavelength of a standing wave in an open basin is ( ) the length of the basin.
A.
'1/2
B.
'1/3
C.
'3/4
D.
'1/4
E.
'2/3
查看完整题目与答案
【多选题】下列反映企业经营成果的要素有( )。
A.
所有者权益
B.
收入
C.
费用
D.
利润
E.
负债
查看完整题目与答案
相关题目：
【简答题】(a) What is the wavelength of an X-ray photon of energy 10.0 keV? (b) What is the wavelength of a gamma-ray photon of energy 1.00 MeV? (c) What is the range of energies of photons of visible light wit...
查看完整题目与答案
【单选题】根据物质流动是否主要由人类活动引起可分成（ ）两类The material flow can be divided into the following（ ）two categories according to whether the material flow is mainly caused by human activity
A.
物质生物地球化学流动和人为流动 Material biogeochemical flow and its anthropogenic cycle
B.
物质随大气流动和随水体流动 Material flowing with the atmosphere and with the water body
C.
物质工业流动和农业流动 Material industrial and agricultural flows
D.
物质产业流动和消费流动 Material industry flow and consumption flow
查看完整题目与答案
【单选题】The de Broglie wavelength of an electron with kinetic energy of 100 keV is ( )
A.
3.702 pm
B.
3.702 nm
C.
3.702 fm
D.
3.702 mm
查看完整题目与答案
【单选题】It has been predicted that AI can replace human in every activity in ________.
A.
2021
B.
2031
C.
2051
D.
2061
查看完整题目与答案
【单选题】The wavelength of an EM wave is 0.44 μm, then what is its frequency?
A.
6.82e10 Hz
B.
0.15e(-14) Hz
C.
6.82e5 GHz
D.
1.32e2 Hz
查看完整题目与答案
【单选题】Due to factors like geographic position, atmospheric circulation, _______ and human activity, China can be divided into three climate zones.
A.
temperature
B.
altitude
C.
longitude
D.
precipitation
查看完整题目与答案
【单选题】The wavelength of an electron whose velocity is 1.7 × 10 4 m/s and whose mass is 9.1 × 10 -28 g is __________ m.
A.
4.3 × 10 -11
B.
12
C.
4.3 × 10 -8
D.
2.3 × 10 7
E.
2.3 × 10 -7
查看完整题目与答案
【单选题】Packaging is an activity closely associated with the revolution of society and , can be __ to human beginning .
A.
traced back
B.
come back
C.
tracked back
D.
gone back
查看完整题目与答案
【单选题】The wavelength of a standing wave in an open basin is ( ) the length of the basin.
A.
'1/2
B.
'1/3
C.
'3/4
D.
'1/4
E.
'2/3
查看完整题目与答案
【多选题】下列反映企业经营成果的要素有( )。
A.
所有者权益
B.
收入
C.
费用
D.
利润
E.
负债
查看完整题目与答案
参考解析：
知识点：
题目纠错 0
发布
创建自己的小题库 - 刷刷题