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【单选题】
在相同的条件下,若将异步电动机的磁极数越多,电动机输出的转矩()。A.
越大
B.
越小
C.
不变
D.
与磁极数无关
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【单选题】To which of the following is the author likely to agree? A A now boom, on the horizon.
B.
Tighten the belt, the single remedy.
C.
Caution all right, panic not.
D.
The more ventures, the more chances.
【简答题】To make sure that we live now on 80% of our income and invest the other 20%, the author suggests applying to the bank for ______ .
【单选题】The author is now convinced that ______.
A.
It is natural for all people to think of the center of the world as being somewhere very familiar to them
B.
there can be only one center of the world and it is where he was born in New England---people in other countries do not know this
C.
there can be only one center of the world and it is the rock pinnacle in the Brazilian village but most Americans do not know this
D.
there are two centers of the world, one in the United States in the cultural sense, and the other in Brazil in the geographical sense
【单选题】The author is now convinced that _____.
A.
It is natural for all people to think of the center of the world as being somewhere very familiar to them
B.
there can be only one center of the world and it is England people in other countries do not know thy here he was born in New
C.
there can be only one center of the world and it is the rock pinnacle in the Brazilian village but most Americans do not know this
D.
there are two centers of the world, one in the United States in the cultural sense, and the other in Brazil in the geographical sense
【单选题】要查询所有课程中，各门课程的最低分，下面SQL语句正确的是( )。
A.
SELCET 课程号,MIN(成绩) FROM 选课表 GROUP BY 课程号;
B.
SELCET 课程号,SUM(成绩),FROM 选课表 GROUP BY 课程号;
C.
SELCET 课程号,MAX(成绩),MIN(成绩),AVERAGE(成绩) FROM 选课表 GROUP BY 课程号;
D.
SELCET 课程号, MAX(成绩), FROM 选课表 GROUP BY 课程号;
【单选题】According to the author, learning should now be done in school for all the following reasons EXCEPT that______.
A.
more subjects are to be covered
B.
more parents should be involved in teaching
C.
there should be a deeper understanding of a subject
D.
more time is needed for becoming independent
【单选题】To which of the following is the author likely to agree?
A.
A now boom, on the horizon．
B.
Tighten the belt, the single remedy．
C.
Caution all right, panic not．
D.
The more ventures, the more chances．
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