题目内容

在描绘花朵及背景时,可以用哪些方法增强画面的空间感?

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以下哪个选项可以完成功率放大?

A. 晶体管
B. 固态继电器
C. 晶闸管
D. 运算放大器
E. OC门

已知电路复阻抗Z=3-j4Ω,则该电路一定呈()

A. 感性
B. 容性
C. 阻性
D. 不一定

已知一单口网络复阻抗为Z=5+j4 ,该单口网络是( )性质负载

A. 感性
B. 阻性
C. 容性

Choose the best version:剪纸是中国民间艺术的一种独特形式,已有2000多年历史。

A. 简单句,可译为:Paper cutting is a unique form of folk arts in China, with a history of more than two thousand years.
B. 并列句,可译为:Paper cutting is a unique form of folk arts in China,and has a history of more than two thousand years.
C. 复杂句,可译为:Paper cutting is a unique form of folk arts in China which has a history of more than two thousand years.

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