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【判断题】
聚合酶链式反应(PCR)是一种用于放大扩增特定的DNA片段的分子生物学技术。( )A.
正确
B.
错误
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举一反三
【单选题】Which one is the duty of the lord to the king?
A.
They were obligated to come to his aid in the event of invasion
B.
They must stay in the capital of the country.
C.
The officers were nominated in their territories.
D.
They must send their son to the capital
【单选题】The principal duty of the United Nations is to safeguard the pace of the world.
A.
primary
B.
prime
C.
privileged
D.
precedent
【单选题】The principal duty of the United Nations is to safeguard the peace of the world.
A.
primary
B.
prime
C.
privileged
D.
precedent
【简答题】B It is the duty of every man to work. The life of a lazy man is of no use to himself and to others. The man who is too lazy to work is the man who is generally most ready to beg or to steal. Every bo...
【简答题】It is the duty of every man to work. The life of a lazy man is of no use to himself and to others. The man who is too lazy to work is the man who’s generally most ready to beg or steal. Every boy shou...
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