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【多选题】
串联电流负反馈对放大电路性能的影响( )。
A.
增大输入电阻
B.
减小输入电阻
C.
增大输出电阻
D.
减小输出电阻
E.
稳定电压放大倍数
F.
稳定电流放大倍数
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A.
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A.
1
B.
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C.
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D.
4
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【单选题】关于眼的血液供应,正确的是
A.
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B.
眼动脉经眶下裂入眶内
C.
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D.
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【多选题】下列选项中,属于错觉的是( )
A.
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B.
掂量一公斤棉花和一公斤铁块时,感觉铁块重
C.
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D.
心情愉快时感觉时间过得快,悲伤时感觉时间过得慢
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