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【单选题】
若某反应的活化能为80KJ/mol,则反应温度由20度增加到30度,其反应速率常数约为原来的( )。
A.
2
B.
3
C.
4
D.
5
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举一反三
【单选题】How long have the people known each other?
A.
a day
B.
a few months
C.
a year
【单选题】ICU收治对象不包括
A.
器官功能衰竭的病人
B.
急性中毒的病人
C.
器官移植的病人
D.
严重的复合外伤病人
E.
传染性疾病病人
【单选题】听力原文:W: How long have you known Susan? M: I've known her about three years. I met her in the library where we used to read, but now I can only see her on the campus occasionally. Where did Susan often...
A.
In the library.
B.
In the college.
C.
On the campus.
【单选题】How long have you known each other?
A.
A very long time, since I was a kid. prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
B.
It is small but beautiful. prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
C.
No, we don ’ t. prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
D.
No. We live in the same neighborhood . prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
E.
Twice a month. prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
【单选题】下面的对自定style的方式正确的是
A.
fill_parent
B.
fill_parent
C.
fill_parent
D.
fill_parent
【单选题】______ have you known the city? For five years. [     ]
A.
How long
B.
How often
C.
How many
D.
How much
【单选题】下列程序语句不正确的是(  )
A.
INPUT“MATH=”;a+b+c
B.
PRINT“MATH=”;a+b+c
C.
a=b+c
D.
a1=b-c
【单选题】下列程序语句不正确的是  (    )
A.
INPUT“MATH=”;a+b+c
B.
PRINT“MATH=”;a+b+c
C.
a=b+c
D.
a=b-c
【判断题】由于水利工程建设项目经济评价采用的数据,大多数来自预测或者估算结果,其效益、费用和计算期等都存在着一定程度的不确定性。
A.
正确
B.
错误
【单选题】决 定化学反应速率的主要因素是反应物的性质,影响反应速率的因素有 、 、 温度、催化剂等.
A.
浓度 、 压强
B.
体积、熵
C.
吉布斯自由能、内能
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