What do parents and coaches care most about?
A. The children can enjoy the sports.
B. The children are in better physical condition.
C. The children can benefit in character.
D. The children can win in the sports.
查看答案
What would Coach Vince Lombardi agree with?
A. Failure teaches us more than success.
B. Sports should be played only for fun.
C. All athletes should be encouraged to try their best.
D. Children should not take part in competitive games.
模拟信号是（ ）信号。
A. 时间和数值上连续
B. 时间连续，数据不连续
C. 时间不连续，数值连续
D. 时间和数值上均不连续
数字信号是（）信号
A. 时间和数值上均具有离散性
B. 时间上有离散性，数值上有连续性
C. 时间有连续性，数值有离散性
D. 时间连续、数值连续
电子系统组成原则
A. 满足功能和性能指标
B. 电路尽量简单
C. 满足电磁兼容性、系统可测
D. 统筹考虑，多选通用件，少选专用件
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