在大肠杆菌的多肽链合成中，其氨基端的氨基酸残基是（） A.丝氨酸 B.蛋氨酸 C.N
题型：单项选择题
问题：
在大肠杆菌的多肽链合成中，其氨基端的氨基酸残基是（）
A.丝氨酸
B.蛋氨酸
C.N－甲酰蛋氨酸
D.N－甲酰丝氨酸
E.谷氨酸
题型：单项选择题
阅读理解。
When it was getting dark, a wolf was walking along the road. Then he was surprised to see his huge
shadow(影子) under his feet.
"Wow, I didn't know I was so bi
g!" The wolf was happy to know it.
As time went by, the sun was going down and his shadow grew bigger and bigger, so it looked like
a giant.
"Oh, look at my shadow. I'm so big!" The wolf thought that he was as big as his shadow. "I'm huge
and excellent. I don't need to be afraid of the lion."
From then the wolf walked with his shoulders open. He thought of himself as the king of the forest.
"Why should I fear the lion? Lion! Come out!Here is your match(对手)."It made the lion very angry,
so he went to see the wolf.
"Here I am. I heard you said you could beat me. Now I'm here. Why don't you prove it?"
The lion's sharp claw(爪子) hit the wolf's head hard. "Thump! " The wolf was knocked out. "Ah,
help me!"
But it was too late when the wolf got to know that he wasn't as big or strong as his shadow.
Unluckily, he became the lion's delicious supper.
1. Why was the wolf so surprised?
A. He grew very quickly.
B. He beat the other animals in the forest.
C. He saw his huge shadow.
D. He didn't need to be afraid of the lion any more.
2. What does the word "giant" in the passage probably mean?
A.大力士
B.巨人
C.怪兽
D.野人
3. The wolf went to the lion to________________.
A. send him some food
B. ask for some food
C. tell him something surprising
D. show his strong body
4. What was the result?
A. The lion ate the wolf.
B. The wolf ate the lion.
C. They became good friends.
D. The wolf became the king of the forest.
5. Which one is the best title for this passage?
A. A wolf and his shadow
B. A wolf and a lion
C. The king of the forest
D. A strong wolf
