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【单选题】
下列关于观察法的局限,叙述错误的是( )
A.
在观察对象分散、人数众多的时候应用困难
B.
观察结果的代表性不高
C.
观察结果易受观察者主观因素影响
D.
观察法难以考察个体差异
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参考答案:
举一反三
【简答题】A customer is complaining to a shop assistant about a box of printing paper she bought. Listen to the conversation and decide whether the following statements are true or false. Then write key words t...
【判断题】A foreign guest is complaining of your slow service. You turn to him and say "Wait your turn".
A.
正确
B.
错误
【简答题】Task 3 A customer is complaining to a shop assistant about a box of printing paper she bought. Listen to the conversation and decide whether the following statements are true or false. Then write ke...
【判断题】随机变量分为 离散型和连续型
A.
正确
B.
错误
【单选题】已知正弦交流电压 , ,则 ()
A.
622V
B.
0V
C.
422V
D.
220V
【简答题】在人群中大量传播的传染病,称()。
【判断题】Listen to a conversation between Alice andEric and decide whether the following statements are true or false. Then writedown the key words to support your answers. u02p32.mp3: Alice is complaining to ...
A.
正确
B.
错误
【单选题】吊装在机翼上的发动机对于机翼的载荷可认为是:
A.
分散载荷
B.
集中载荷
C.
质量力
D.
惯性力
【单选题】在华中数控系统中,下列( )指令既能用于圆柱、圆锥螺纹加工又能用于端面螺纹加工。
A.
G76
B.
G82
C.
G32
D.
G90
【简答题】Task 3 A customer is complaining to a shop assistant about a box of printing paper she bought. Listen to the conversation and decide whether the following statements are true or false. Then write key...
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