若有说明：intx[3][4];则对a数组元素的正确引用是【】。
A. )x[2][4]
B. )x[1,3]
C. )x[4-2][0]
D. )x[0][4]
查看答案
（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
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
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