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【判断题】
多顺反子 mRNA 含有多个起始密码子和终止密码子。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】听力原文：W: Don't forget, we will have a match with Class Three tomorrow. M: Ok. W: You must practice more. Otherwise they will beat us. M: Beat us? Out of the question! What's the man's intention?
A.
They will have a match with Class Three tomorrow.
B.
They will beat Class Three.
C.
They must have more practice.
D.
There is some question in they will beat Class Three.
【单选题】听力原文： W: Did you go to the football match on Saturday? M: No, I had to attend a wedding ceremony, and I was driving all the way from Leeds to Edinburgh. But I listened to the football commentary over ...
A.
He was attending a wedding ceremony.
B.
He was on his way to Edinburgh.
C.
He was in the football stadium.
D.
He was in the cinema, with the woman.
【简答题】生物圈中的物质循环发生在生物与环境之间。图中12表示生物体的某些生理活动,“”箭头代表物质和能量的流动方向。请据图回答: (1)过程1代表动植物等通过________作用产生二氧化碳和水。过程2需要在细胞的叶绿体中将________转变成储存了能量的________。 (2)A既可以是细菌,也可以是________,它们都是生态系统中的另一组成——________。 (3)由图可知,生态系统组成中...
【单选题】At the start of a tennis match there must be complete among the fans .
A.
peace
B.
piece
C.
silence
D.
quiet
【简答题】100Base-T网络的电缆标准最大有效传输距离是（）米。
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