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【单选题】
吊顶的组成构件主要包括()A.
吊筋、龙骨、面板
B.
吊筋、主龙骨和次龙骨
C.
面板、龙骨和灯槽
D.
主龙骨、次龙骨和面板
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【单选题】听力原文： You could say that Joseph Cornell became an artist because of his love of collecting. Cornell used to spend his free time exploring the street life of New York City in the 1920s. He soon started...
A.
He explored the night life of New York.
B.
He collected used boxes from the streets.
C.
He joined many art-related activities.
D.
He organized an artistic group.
【单选题】某工程项目期初投资1000万元,两年建成投产。投产后每年的净收益是150万元,请问该项目的投资回收期是多少( )
A.
8年
B.
8.67年
C.
8.7年
D.
9年
【简答题】In 1826, a Frenchman named Niepce needed pictures for his business . But he was not a good artist . So he invented a very camera ( 照相机 ). He put it in a window of his house and took a picture o...
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