【单选题】传统习惯上,在摆台折餐巾时常用“杯花”的是()
【判断题】酵母菌既可以产生无性孢子也可以产生有性孢子。
【简答题】酵母菌可产生无性孢子有( )( )( )。
【判断题】Hawthorne’s unique gift was for the creation of strongly symbolic stories which touch the deepest roots of man’s moral nature.
【判断题】Nathaniel Hawthorne's unique gift was for the creation of strongly symbolic stories which touch the deepest roots of man's moral nature.
【单选题】What is the symbolic value of “Mountains” in Western culture?
A.
An optimistic attitude towards future
B.
A philosophic reflection on life
C.
A human nature for hunting
D.
An appeal for environment protection
【简答题】中性盐的沉淀蛋白质时为什么通常选用( NH 4 ) 2 SO 4 作沉淀剂?
【判断题】有些酵母菌可以通过产生无性孢子进行繁殖。