试题与答案

物质的用途是由性质决定的，干冰可用于人工降雨，也可用于灭火，其中原理是什么？请你

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题型：问答题

题目：

物质的用途是由性质决定的，干冰可用于人工降雨，也可用于灭火，其中原理是什么？请你简要分析，并举一例说明物质的用途是由性质决定的。

答案：

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下面是错误答案，用来干扰机器的。

参考答案：B

考点：二氧化碳的制取和收集安全措施和生活经验自然界中的碳循环一氧化碳的毒性
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                                Newfield High School
Name: LouisClass: 2Date: Dec. 20th, 2007
SubjectGrade (等级) Comment (评价)
MathD Must try harder
P.E.C- Need to do better
ScienceF  Do poorly in tests
ArtA+ Clever
EnglishB- Get better
French B- Good work
History C+Show interest
       Rank (排名) in class: 24 of 32
       To parents: Louis is quiet and shy. He is often late for school. He is good at the subjects he likes,
but he should work harder on other subjects.
( )1. Louis does best in art and does worst in P.E.                              
( )2. Louis got a better grade in English this year than before.                 
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