— How was you trip, Lily?
一 Great.
A:day
B:journey
C:homework
如图所列的六种氨基酸,其中每种只有一个.据题意回答下列问题:
—That's true. In addition, she won the first prize of Chemistry competition.
下列函数是偶函数,且在(-∞,0)上单调递减的是 ( )