A:洗涤,2次
B:过滤,2次
C:分液,3次
D:过滤,3次
A. Guess!
B. When is your birthday?
C. Yes. My birthday is on Dec. 2nd. It is my eleventh birthday this year. What about you?
D. Is your birthday in December?
E. My birthday is on Sept. 4th.
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“人间四月芳菲尽,山寺桃花始盛开”,在这句诗中主要影响桃花开放的生态因素是( )