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【判断题】
正投影法的投射线相互平行且垂直于投影面。所以当空间平面图形平行于投影面时,其投影将反映该平面图形的真实形状和大小。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】What was the finding of the experiment?
A.
Passengers helped a lot during incidents.
B.
Very few foreigners err in the train.
C.
Very few passengers tried to help during incidents.
D.
Some people were good at acting in the train.
【简答题】 简述间歇强化的类型?
【单选题】During World War I, radio ______ .
A.
was very popular among the public
B.
was the symbol of family entertainment
C.
had developed to a high level
D.
was facing some technical problems
【简答题】由两门或两门以上的多学科知识交叉、渗透、融合而生成的课程是( )。
【单选题】听力原文： My first visit to the cinema was a very unhappy one. I was taken there by some friends when I was only seven years old. At first there were bright lights and music and I felt quite happy. When t...
A.
Happy.
B.
Sad.
C.
Unhappy.
D.
Excited.
【简答题】阅读短文，判断正(T)误(F)。 It was Sunday. I was very busy. I did my homework in the morning. In the afternoon I washed my clothes. I cleaned my room. I played football with my friends. In the evening I visited ...
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