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【简答题】
一能量为10 12 eV的宇宙射线粒子,射入一氖管中,氖管内充有 0.1 mol的氖气,若宇宙射线粒子的能量全部被氖气分子所吸收,则氖气温度升高了______×10 -7 K.(1 eV=1.60×10 -19 J,普适气体常量R=8.31 J/(mol·K))(填3个数字+小数点)
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举一反三
【多选题】Which of the followings are safe topics to discuss?
A.
Salary and pets.
B.
Marriage and pets.
C.
Weather and hobbies.
D.
Sports and travelling.
【多选题】What topics are safe to talk about when meeting for the first time?
A.
weather
B.
transportation
C.
work
D.
politics
【多选题】what topics are safe to talk about when meeting for the first time?
A.
weather
B.
transportation
C.
work
D.
politics
【简答题】What are the safe topics when you meet someone new?
【多选题】Which of the followings are safe topics to discuss?
A.
Salary and pets.
B.
Weather and hobbies.
C.
Sports and travelling.
【简答题】辣椒为()授粉作物,以()为主,但有一定的()。
【简答题】评定表面粗糙度的主要参数是______参数，附加参数是______和______参数。
【多选题】Safe topics include
A.
Your Health problems
B.
Travel
C.
Sports and Recreation
D.
Arts and Entertainment
【简答题】拉床的主参数是_________，钻床的主参数是________。
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