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【单选题】
某酸在18℃时的平衡常数为1.84×10 －5 ，在25℃时的平衡常数为1.87×10 －5 ，则说明该酸（）。A.
在18℃时溶解度比25℃时小
B.
的电离是一个放热过程
C.
温度高时电离度变大
D.
温度低时溶液中的氢离子浓度变大
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举一反三
【简答题】The competition attracted over
500 college students _____________ 8 different countries. ( representation )
【单选题】Soon after starting his job as supervisor of the Memphis, Tenn., public schools, Kriner Cash ordered an assessment of his new district’s 104,000 students. What most concerned him was that the number o...
A.
is controversial among educators
B.
is a decisive period for students
C.
is the best time to solve homelessness
D.
is the greatest roadblock in education
【单选题】信息产业是继农业、工业、服务业之后顺序出现的有重大影响的第四产业，下列关于信息产业的说法中不正确的一项是( )
A.
各种无线通信服务和在线信息服务都属于信息产业
B.
截至2010年年底，我国网民数量达到4.57亿，首次超越美国，跃居世界第一位
C.
信息产业已成为中国工业的第一支柱产业
D.
信息产业特指将信息转变为商品的行业
【单选题】信息产业是继农业、工业、服务业之后顺序出现的有重大影响的第四产业，下列关于信息产业的说法中不正确的一项是（ ）。
A.
各种无线通信服务和信息服务都属于信息产业
B.
截至2010年年底，我国网民数量达到4．57亿，首次超越美国，跃居世界第一位
C.
信息产业已成为中国工业的第一支柱产业
D.
信息产业特指将信息转变为商品的行业
【单选题】Soon after starting his job as supervisor of the Memphis, Tenn., public schools, Kriner Cash ordered an assessment of his new district’s 104,000 students. What most concerned him was that the number o...
A.
from poor families
B.
study in private schools
C.
were born in rich families
D.
were “highly mobile”
【简答题】The competition attracted over 500 college students _____________ ( representation) 8 different countries.
【单选题】Soon after starting his job as supervisor of the Memphis, Tenn., public schools, Kriner Cash ordered an assessment of his new district’s 104,000 students. What most concerned him was that the number o...
A.
Consult references
B.
Do a part-time job
C.
Write his new book
D.
Use the multimedia
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