题干
—Linda, I will go to the zoo with my parents today.
—Oh, great! ______.
A：Excuse me
B：You're welcome
C：Thank you
D：Have a nice day
答案(点此获取答案解析）
D
—Linda, I will go to the zoo with my parents today.
—Oh, great! ______.
A：Excuse me
B：You're welcome
C：Thank you
D：Have a nice day
＝4x3－4x，则当f（x）取得最大值－5时，x的值应为 （ ）