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【单选题】
She looked out of the window, ________ for her lost youth. [ ]A.
sighing
B.
shouting
C.
striving
D.
longing
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举一反三
【单选题】——
A.
People in their early forties lack ambition.
B.
People in their late fifties lack ambition.
C.
People in their mid forties lack ambition.
D.
People around fifties lack ambition.
【简答题】RA( 类风湿性关节炎)致残性强,是一种自身免疫病。该病与TNF-α(肿瘤坏死因子-α)密切相关。研究表明,一种人鼠嵌合的抗TNF-α单克隆抗体能有效治疗RA。下图为该单克隆抗体制备过程示意图。 (1)单克隆抗体的制备应用到细胞工程中的 ___________________ 、 ____________________ 技术。 (2)图中的抗原A是 ___________ ,HAT培养基的作用 ...
【单选题】According to the first paragraph, we can know that
A.
the India firm has been founded for 72 years.
B.
most French workers retire in their mid-forties.
C.
the French firm finally found someone suitable to talk to the patriarch.
D.
no French workers wanted to go to India.
【简答题】下图表示用生物工程制备人抗A抗体的过程。请回答下列问题 (1)人的红细胞膜表面有被称为凝集原的特异糖蛋白，从免疫学角度看，这种凝集原是_______。 (2)图中细胞1是小鼠体内注入人A型血红细胞后而获得的________细胞，这种细胞具有产生_________的特点，但难以在体外培养。甲培养皿中培养的细胞2，是从患骨髓瘤的小鼠体内获取的骨髓瘤细胞，这种细胞在体外培养时能_____________...
【判断题】In their mid-forties, most executives would go on working so as to achieve all their important goals in life.
A.
正确
B.
错误
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