A:青霉
B:酵母
C:曲霉
D:毛霉
—This history book is of great value.
—Exactly. _____ can be enjoyed from it ______ you have a deep understanding of it, however.
阅读诗歌,回答问题
春夜洛城闻笛
李白
谁家玉笛暗飞声,散入春风满洛城。
此夜曲中闻折柳,何人不起故园情。