After failing again and again, most animals give up hope.
A: A
B: B
C: C
D: D
E: E
F: F
G: G
H: H
I: I
J: J
K: K
A: A
B: B
C: C
D: D
E: E
F: F
G: G
H: H
I: I
J: J
K: K
举一反三
- ____After failing again and again, most animals give up hope.
- ______ After failing again<br/>and again, most animals give up hope.
- 已知一棵二叉树的前序序列为：A，B，D，G，J，E，H，C，F，I，K，L；中序序列为：D，J，G，B，E，H，A，C，K，I，L，F。该二叉树的后序序列为（）。 A: J，H，F，B，G，D，K，L，I，F，C，A B: J，G，E，B，K，L，D，H，I，F，C，A C: J，G，D，H，E，B，K，L，I，F，C，A D: J，G，D，H，E，B，K，L，I，F，A，C
- applying to work in a restaurant A: a B: b C: c D: d E: e F: f G: g H: h I: i J: j K: k L: l
- Some fast-food firms provide healthy food to give the impression they are helping to tackle the obesity problem. A: A B: B C: C D: D E: E F: F G: G H: H I: I J: J K: K