题目内容

(多选)七段数码管有()

A. 共阳极
B. 共集电极
C. 共阴极
D. 共发射极
E. 共基极

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Crude jade tools appeared in China as early as in the Shang and Zhou Dynasties.

A. 对
B. 错

Actually, jade is a kind of stone.

A. 对
B. 错

Jade can only be carved into human figurines, containers, images of birds, animals, flowers.

A. 对
B. 错

Da Yu Harnesses Flood” demonstrates the highest skill of Chinese carving artists.

A. 对
B. 错

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