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【单选题】
Man: You speak English very well. How long have you been learning the language? Woman: I’ve been learning English for about six and a half years. Q: How long has the woman been learning?A.
Five years
B.
Six and half years
C.
Six years
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举一反三
【单选题】In 1957, a doctor inSingaporenoticed that hospitals were treating an unusual number of influenza-like cases. Influenza is sometimes called “flu” or a “bad cold”. He took samples from the throats of pa...
A.
To test the speed and effect of virus reproduction.
B.
To see how it can affect the animals.
C.
To find the channel of the virus spread.
D.
To decide on the virus name.
【简答题】食用菌的脱水干制技术里,烘烤中应怎洋调换位置?
【单选题】CD8.Tc细胞活化的第一信号是
A.
TCR识别自身MHC-Ⅰ-靶细胞表面的肽Ag
B.
协同刺激因子在靶细胞表面的表达
C.
CD8.Tc表达IL-2受体
D.
CD8.Tc表达IFN-γ受体
E.
受IL-12和IFN-γ的作用
【简答题】In 1979, a doctor in Singapore noticed that hospitals were treating an unusual number of influenza cases. Influenza is sometimes called “ flu ” or a “ bad cold ” . He took samples from the throats of ...
【单选题】CD8(+)Tc细胞活化的第一信号是
A.
TCR识别自身MHC-I-靶细胞表面的肽抗原
B.
协同刺激因子在靶细胞表面的表达
C.
CD产Tc表达IL-2受体
D.
CD8(+)Tc表达IFN-γ受体
E.
受IL-12和IFN-γ的作用
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