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【单选题】
下列有关密码子的叙述，错误的一项是（）
A.
能决定氨基酸的密码子为64个
B.
一种氨基酸可有多种对应的密码子
C.
同一种密码子在人和猴子细胞中决定同一种氨基酸
D.
CTA肯定不是密码子
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参考答案：
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【单选题】听力原文： The United Nations Refugee Agency, UNHCR, says some Afghan refugees who have lived in Pakistan for two decades are returning home to areas of Afghanistan that are considered safe. Lisa Schlein i...
A.
200.
B.
41.
C.
No one.
D.
We can not say exactly.
查看完整题目与答案
【单选题】右心室收缩时,血液由右心室射入( )
A.
主动脉
B.
肺动脉
C.
上腔静脉
D.
下腔静脉
E.
肺静脉
查看完整题目与答案
【单选题】听力原文：W: What are you reading now? M: Im looking at this beauty in the picture. Look! Shes really pretty, isnt she? Her skin looks so smooth! W: Well, its just that she puts lots of make-up on her face...
A.
They will eat more cucumbers.
B.
They tend to put lots of make-up on face.
C.
They tend to try natural vegetable on the skin.
D.
They will have some cosmetic surgery on the face.
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【单选题】连于环状软骨下缘与第1气管软骨环之间的结构称
A.
环甲正中韧带
B.
前庭韧带
C.
方形膜
D.
环状软骨气管韧带
E.
甲状舌骨膜
查看完整题目与答案
【单选题】听力原文： The British enjoy the family outing. Most people choose well-known beauty spots, or seaside beaches, where they are often so crowded together that you cannot see the sand. Others choose a lonely...
A.
A metropolitan city
B.
Seaside beaches
C.
A mountainous area
D.
Beautiful lakes
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【单选题】左右心室收缩时
A.
二尖瓣开放
B.
三尖瓣开放
C.
主动脉瓣开放
D.
肺动脉瓣关闭
E.
心房也收缩
查看完整题目与答案
【单选题】当右心室收缩时,防止右心室内的血液逆流的装置是
A.
二尖瓣
B.
三尖瓣
C.
主动脉瓣和二尖瓣
D.
肺动脉瓣和三尖瓣
E.
主动脉瓣和肺动脉瓣
查看完整题目与答案
【单选题】听力原文：M: Excuse me, can you tell me the way to the Sleeping Beauty Castle? W: Yes, go straight ahead. It's about four hundred yards down this street. What's the relationship between the two people?
A.
Friends．
B.
Strangers．
C.
Classmates．
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【单选题】听力原文：M: Excuse me ,can you tell me the way to the sleeping Beauty Castle? W: Yes, Go straight ahead. It’s about four hundred yards down this What's the relationship between the two people?
A.
Friends.
B.
Strangers.
C.
Classmates.
查看完整题目与答案
【单选题】连于环状软骨下缘与第1气管软骨环之间的结构为
A.
环甲正中韧带
B.
前庭韧带
C.
方形膜
D.
环状软骨气管韧带
E.
甲状舌骨膜
查看完整题目与答案
相关题目：
【单选题】听力原文： The United Nations Refugee Agency, UNHCR, says some Afghan refugees who have lived in Pakistan for two decades are returning home to areas of Afghanistan that are considered safe. Lisa Schlein i...
A.
200.
B.
41.
C.
No one.
D.
We can not say exactly.
查看完整题目与答案
【单选题】右心室收缩时,血液由右心室射入( )
A.
主动脉
B.
肺动脉
C.
上腔静脉
D.
下腔静脉
E.
肺静脉
查看完整题目与答案
【单选题】听力原文：W: What are you reading now? M: Im looking at this beauty in the picture. Look! Shes really pretty, isnt she? Her skin looks so smooth! W: Well, its just that she puts lots of make-up on her face...
A.
They will eat more cucumbers.
B.
They tend to put lots of make-up on face.
C.
They tend to try natural vegetable on the skin.
D.
They will have some cosmetic surgery on the face.
查看完整题目与答案
【单选题】连于环状软骨下缘与第1气管软骨环之间的结构称
A.
环甲正中韧带
B.
前庭韧带
C.
方形膜
D.
环状软骨气管韧带
E.
甲状舌骨膜
查看完整题目与答案
【单选题】听力原文： The British enjoy the family outing. Most people choose well-known beauty spots, or seaside beaches, where they are often so crowded together that you cannot see the sand. Others choose a lonely...
A.
A metropolitan city
B.
Seaside beaches
C.
A mountainous area
D.
Beautiful lakes
查看完整题目与答案
【单选题】左右心室收缩时
A.
二尖瓣开放
B.
三尖瓣开放
C.
主动脉瓣开放
D.
肺动脉瓣关闭
E.
心房也收缩
查看完整题目与答案
【单选题】当右心室收缩时,防止右心室内的血液逆流的装置是
A.
二尖瓣
B.
三尖瓣
C.
主动脉瓣和二尖瓣
D.
肺动脉瓣和三尖瓣
E.
主动脉瓣和肺动脉瓣
查看完整题目与答案
【单选题】听力原文：M: Excuse me, can you tell me the way to the Sleeping Beauty Castle? W: Yes, go straight ahead. It's about four hundred yards down this street. What's the relationship between the two people?
A.
Friends．
B.
Strangers．
C.
Classmates．
查看完整题目与答案
【单选题】听力原文：M: Excuse me ,can you tell me the way to the sleeping Beauty Castle? W: Yes, Go straight ahead. It’s about four hundred yards down this What's the relationship between the two people?
A.
Friends.
B.
Strangers.
C.
Classmates.
查看完整题目与答案
【单选题】连于环状软骨下缘与第1气管软骨环之间的结构为
A.
环甲正中韧带
B.
前庭韧带
C.
方形膜
D.
环状软骨气管韧带
E.
甲状舌骨膜
查看完整题目与答案
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