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【单选题】
串励直流电动机在一定的负载下运行，若电源电压有所降低，则转子的转速将会（）。A.
变大。
B.
保持不变。
C.
变小。
D.
以上都不对。
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【单选题】The American Government is involved in the program because ______.
A.
the schools are public schools
B.
the Government is to finance the program
C.
the Government grants visas to the foreign teachers
D.
the program involves bilingual education
【简答题】Most American students go to traditional public schools．There are about 88, 000 public schools, all over the US．Some students attend about 3000 independent public schools called charter schools． Chart...
【单选题】American schools are divided into（）
A.
public schools and private ones
B.
Public schools,private schools and community schools
C.
coeducation schools and single sex schools.
D.
national schools and state-run schools
【单选题】What is the passage mainly about?
A.
The intellectual development of American schools.
B.
The independence of American schools from Europe.
C.
The central control of American schools.
D.
The role of local authority in American schools.
【简答题】WORD2000默认的文件扩展名为() A、Dot B、XLs C、Doc D、TXt
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