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【單選題】
一條多肽鏈共有肽鍵99個，則它含有的氨基和羧基的數目至少是（ ）
A.
110.110
B.
109.109
C.
9.9
D.
1.1
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舉報參考答案：
舉一反三
【單選題】Where did the man see Todd’s new car?
A.
On the way to the shop.
B.
In front of Todd’s house.
C.
In front of the man’s house.
【單選題】What are the two speakers talking about？
A.
A football on TV.
B.
Things that they are going to do tonight.
C.
The TV program Discovery.
【單選題】Why did Todd and Cathy invite their friends to their house？
A.
They wanted them to see their new car.
B.
They wanted to see their friends’ children.
C.
They wanted to show them the movies taken back from China.
【單選題】What are the two speakers going to do after talking？
A.
Go back home for sleep.
B.
Take a walk.
C.
Watch the program Discovery.
【單選題】What is the time that the conversation is going on？
A.
8:25 p. m.
B.
9:25 p. m.
C.
7:25 p. m.
相關題目：
【單選題】Where did the man see Todd’s new car?
A.
On the way to the shop.
B.
In front of Todd’s house.
C.
In front of the man’s house.
【單選題】What are the two speakers talking about？
A.
A football on TV.
B.
Things that they are going to do tonight.
C.
The TV program Discovery.
【單選題】Why did Todd and Cathy invite their friends to their house？
A.
They wanted them to see their new car.
B.
They wanted to see their friends’ children.
C.
They wanted to show them the movies taken back from China.
【單選題】What are the two speakers going to do after talking？
A.
Go back home for sleep.
B.
Take a walk.
C.
Watch the program Discovery.
【單選題】What is the time that the conversation is going on？
A.
8:25 p. m.
B.
9:25 p. m.
C.
7:25 p. m.
參考解析：
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