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科学家们已经陆续从病死的家禽和候鸟体内分离到了H5N1亚型禽流感病毒(一种RNA病毒),现在若生产可以用于预防和治疗禽流感的抗体,请根据下面的单克隆抗体制备过程示意图回答有关问题: (1)若A细胞是骨髓瘤细胞,则B细胞是取自感染病毒的动物或人体内的 细胞,d过程的常用诱导方法是____________(写出两种方法)。细胞融合体现了细胞膜的特点是_____________________________________。 (2)假设仅考虑某两个细胞的融合,则可形成________种类型的C细胞,因此需要筛选出____________________________的D细胞用于培养。D细胞的名称是____________。 (3)在进行细胞培养时,一般要满足以下条件:________________________。(写出其中的两项) (4)单克隆抗体技术在生物工程技术中占有重要的地位,请列举两项相关的应用: ____________________________________________________________________________。
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【单选题】带“回”字符号标志的手持电动工具是( )工具。
A.
I类
B.
II类
C.
Ⅲ类
【单选题】带“回”字符号标志的手持电动工具是()工具。
A.
Ⅱ类
B.
Ⅰ类
C.
Ⅲ类
【单选题】带“回”字符号标志的手持电动工具是( )工具。
A.
Ⅰ类
B.
Ⅱ类
C.
Ⅲ类
【单选题】带“回”字符号标志的手持电动工具是( )工具。
A.
I类
B.
Ⅱ类
C.
Ⅲ类
D.
以上都不正确
【单选题】The greatest pressure decrease in the circulation occurs across the arterioles because
A.
They have the greatest surface area
B.
They have the greatest cross-sectional area
C.
The velocity of blood flow through them is the highest
D.
The velocity of blood flow through them is the lowest
E.
They have the greatest resistance
【单选题】回流比的( )值为最小回流比
A.
上限
B.
下限
C.
平均
D.
混合
【单选题】A car is going around a racetrack at constant speed. The curves around the track have different radii. In which turn is the magnitude of the car's acceleration the greatest?
A.
It is the greatest in the turn with the greatest radius.
B.
It is the greatest in the turn with the smallest radius.
C.
The acceleration is zero everywhere because of the constant speed.
D.
More information is needed to determine the answer.
E.
None of the others
【单选题】The Security Council has the greatest power in the UN. The main function of it is to maintain international peace and restore peace when conflicts arise. Its decisions are binding on all UN members. T...
A.
is most powerful in the world
B.
is responsible for keeping peace in the world
C.
is under the control of the United States
D.
is a branch of US Congress
【单选题】Austrilia is the greatest island in the world. The greatest island 的同义短语是?
A.
lie in the south of
B.
be known for
C.
both..and..
D.
larger than any other island
【单选题】The human species came into being at the time of the greatest biological diversity in the history of the Earth. Today, as human populations expand and alter the natural environment, they are reducing ...
A.
The reduction in biodiversity represents a setback both for science and for society as a whole.
B.
The material and cultural wealth Of a nation are insignificant when compared with the country's biological wealth.
C.
The human species is in the process of initiating an unprecedented massive extinction episode.
D.
The current decline in species diversity has potentially grave consequences for the human species.
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