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【简答题】
可作为信号分子传递的开关的蛋白质是 A.泛素 B.热激(休克)蛋白 C.逆转录酶 D.蛋白激酶
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【简答题】保险合同的当事人包括被保险人和受益人。
【简答题】人身保险合同的当事人包括( )。 A投保人 B保险人 C被保险人 D受益人
【单选题】How men first learned to invent words is unknown in other words, the origin of language is a mystery. All we really know is that men, unlike animals, somehow invented certain sounds to ex press though...
A.
a legend handed down from the past
B.
a matter that is hidden or secret
C.
a question difficult to answer
D.
a problem not yet solved
【单选题】How men first learned to invent words is unknown in other words, the origin of language is a mystery. All we really know is that men, unlike animals, somehow invented certain sounds to express thought...
A.
is reflected in. sounds and letters
B.
is handed down from generation to generation
C.
dates back to the prehistoric period
D.
is a problem not yet solved
【单选题】How man first learnt to invent words is unknown; in other words, the origin of language is a mystery. All we really know is that man, unlike animals, somehow invented certain sounds to express thought...
A.
clearly explained in this passage
B.
a matter that can not be or has not been explained or understood
C.
a question that was difficult to answer
D.
a problem already solved
【单选题】How men first learned to invent words is unknown in other words, the origin of language is a mystery. All we really know is that men, unlike animals, invented certain sounds to express thoughts and fe...
A.
treasure handed down from the past
B.
a matter that is hidden or secret
C.
a problem not yet solved
D.
a question difficult to answer
【单选题】How men first learnt to invent words is unknown; in other words, the origin of language is a mystery. All we really know is that—men, unlike animals, somehow invented certain sounds to express thought...
A.
Because they wanted to agree on certain signs
B.
As they needed to write them down
C.
Since they wanted to communicate with each other
D.
Now that they could combine them
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