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【简答题】
列举影响教育实验外在效度的主要因素。
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参考答案:
举一反三
【判断题】利用谐波法分析非正弦周期激励信号下的响应,将非正弦周期激励信号分解为一系列不同频率的正弦量之和,再根据线性电路的叠加定理,分别计算各次谐波的正弦量单独作用下在电路中产生的同频正弦分量,最后再将所得的分量按相量形式直接叠加。( )
A.
正确
B.
错误
【单选题】听力原文: A heroin addiction today is found chiefly among young men of minority groups in ghetto areas. Of the more than 60, 000 known addicts, more than half live in New York State. Most of them live in ...
A.
His emotional problems.
B.
His personal problems.
C.
His desperation to get drugs.
D.
His shortage of money.
【简答题】完形填空。 Today, it is a big problem for young graduates to get satisfying jobs. 1_____ that there are thousands of different kinds of jobs in the world. Choosing the right one itself is not easy. 'Findin...
【多选题】下列哪些是中国海关允许入境但需申报的检疫物品:( )
A.
干果
B.
鲜花
C.
犬、猫等宠物
D.
腌制蔬菜
【简答题】As the work became more familiar, his _______ toward school changed from dislike to great enthusiasm A:position B:attitude C:manner D:action
【单选题】非正弦周期信号作用下的线性电路中,电路响应等于其直流分量和各次谐波单独作用时产生的响应的( )的叠加。
A.
有效值
B.
最大值
C.
相量
D.
瞬时值
【单选题】What idea does the writer try to get across?
A.
The more research you do, the more familiar you are on a topic.
B.
The more essays you write, the more likely you become an expert.
C.
The more judgements you make, the more likely you will be rewarded.
D.
The more materials you collect, the less likely you will be an expert.
【多选题】5-4. 对于对方或对方亲属的敬称有()等。选择一项或多项:
A.
B.
C.
D.
【单选题】非正弦周期信号作用下的线性电路中,电路响应等于其直流分量和各次谐波单独作用时产生的响应的( )的叠加。
A.
最大值
B.
有效值
C.
瞬时值
D.
相量
【单选题】______you deal with the data files, the more familiar you get with them.
A.
The more
B.
Because
C.
If
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