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【单选题】
下列有关电子运动状态的描述,正确的是......... ( )A.
s 电子绕核作圆周运动
B.
原子中电子的运动状态可以用四个量子数确定
C.
p 电子绕核走 “8” 字
D.
电子在固定的轨道上不停地自旋
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举一反三
【简答题】When she retired, she looked back on her career with great(satisfy)_____________.
【单选题】The passage is mainly about.
A.
the importance of pre-school education．
B.
the importance of schoolin9．
C.
the role of play in a child’S development．
D.
the choice of toys for adolescents．
【单选题】有一个学生考试成绩为70分，在统计分组中，这个变量值应归入（ ）。
A.
60～70分这一组
B.
70～80分这一组
C.
60～70分或70～80分两组都可以
D.
作为上限的那一组
【单选题】有一个学生考试成绩为70分，在统计分组中，这个变量值应归入（ ）。
A.
60-70分这一组
B.
70-80分这一组
C.
60—70或70—80两组都可以
D.
作为上限的那一组
【单选题】Mrs. Green _______ in this university for more than 20 years when she retired from work last month.
A.
has taught
B.
has been teaching
C.
had been teaching
D.
had been taught
【单选题】39 The fact that children arrive at school at about the same time shows that
A.
schooling imposes a lot of strain on the students.
B.
schooling has a clear boundary.
C.
schooling follows more or less the same pattern.
D.
schooling includes different aspects of learning.
【简答题】Helen Monson has always been interested in helping her community. Her first volunteer experience was for the American Red Cross when she was in high school. When she was a schoolteacher, she also foun...
【单选题】When she retired and went back home in_______,she was already in ______
A.
the fifties,her sixty
B.
fifties,her sixties
C.
the fifties,her sixties
D.
fifty,sixties
【单选题】A______loan is a loan agreement under which finance is required in connection with the sale of one asset and the purchase of another.
A.
gap
B.
connection
C.
bridging
D.
linking
【单选题】有一个学生考试成绩为70分，在统计分组中，这个变量值应归人（ ）。
A.
60-70分这一组 C．60-70或70-80分这两组都可以
B.
70-80分这个一组 D．作为上限的那一组
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