两互相垂直的主子午线均聚焦在视网膜之后,但聚焦位置前后不同( )|两互相垂直的主子午线均聚焦在视网膜之前,但聚焦位置前后不同( )|一主子午线聚焦在视网膜上,另一主子午线聚焦在视网膜之前( )|一主子午线聚焦在视网膜后,另一主子午线聚焦在视网膜之前( )|一主子午线聚焦在视网膜上,另一主子午线聚焦在视网膜之后( ) A. 单纯近视散光 B. 单纯远视散光 C. 复合近视散光 D. 复合远视散光 E. 混合散光
【简答题】On 27th February 2008, something very unusual happened in the UK; there was a rather large earthquake. It was the biggest earthquake in 25 years in the UK. There have been very small tremors in the pa...