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【单选题】
有关科学史的叙述中,正确的是A.
1928年,格里菲思的肺炎双球菌体内转化实验证明了DNA是遗传物质
B.
1953年,沃森和克里克利用同位素示踪技术证明了DNA的半保留复制
C.
1910年,摩尔根通过红眼和白眼果蝇的杂交实验证明了基因在染色体上
D.
1866年,通过豌豆杂交实验发现了基因的分离定律和伴性遗传
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【简答题】广义的痰饮根据水饮停积部位的不同可分为____、____、____、________。
【单选题】For each blank, choose the best answer from the four choices and write down on the answer sheet. (71) is a channel's capacity which directly reflects the data transfer rate of the channel. (72) is an ...
A.
The delay
B.
The volume
C.
The noise
D.
The bandwidth
【简答题】Complete the sentences with the words below. Change the form where necessary. [administrative volunteer meticulous instruct thoroughly registration] 1 Communicatio...
【单选题】Which one is the main idea of the passage?
A.
Smartphones have improved people’s lives and been helpful in a variety of things.
B.
Personal safety takes a back seat when it comes to smartphone usage while driving.
C.
There is a negative inf luence that smartphones have introduced into people’s lives.
D.
The increased use of smartphones has probably reduced human interaction, affecting more than just verbal communication.
【单选题】Which of the following is not the qualities of good inf o rmation?
A.
relevance
B.
completeness
C.
appropriate communication
D.
materiality
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