A:看得清远处的物体
B:晶状体曲度变大
C:成像在视网膜后方
D:眼球前后径变小
Please translate the sentence _______ Chinese. I can't understand it.
已知:如图所示,∠ABC=∠ADC,BF和DE分别平分∠ABC和∠ADC,∠AED=∠EDC.求证:ED∥BF.
证明:∵BF和DE分别平分∠ABC和∠ADC(已知)
∴∠EDC=____ ∠ADC,
∠FBA=____ ∠ABC(角平分线定义).
又∵∠ADC=∠ABC(已知),
∴∠____ =∠FBA(等量代换).
又∵∠AED=∠EDC(已知),
∴∠____=∠____ (等量代换),
∴ED∥BF____.
儒家学说到汉代被注入新的血液,是指