Compared to analog systems, digital systems（）
A. are less prone to noise
B. can represent an infinite number of values
C. can handle much higher power
D. all of the above
在先秦儒家的主要代表人物中，被后世尊为“亚圣”的是（）
B. 墨子
C. 庄子
D. 韩非子
Confucius was born ______（）
A. in Sichuan Province
B. on August 28
C. in the Kingdom of Lu
D. about 1500 years ago
Confucius was good at ______ when he was fifteen（）
A. music
B. Chinese
C. math
D. other subjects
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