下图是模拟眼球成像的实验操作示意图和近视眼成像的示意图,请据图回答:
His ________ to become a pilot was held back by his poor eyesight.
阅读材料回答问题。
材料一:“北通涿郡之渔商,南运江都之转输,其为利也博哉!”
材料二:“尽道隋亡为此河,至今千里赖通波,若无水殿龙舟事,共禹论功不计多。” ——唐朝诗人皮日休
材料三:观察图片,回答问题:
请回答: