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【单选题】
鉴定病毒的实验中,无特异性的方法是A.
中和试验
B.
免疫荧光试验
C.
血凝试验
D.
血凝抑制试验
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举一反三
【简答题】A．Grocer. B．Taxicab driver. C．Carpenter. D．Shoe maker.
【单选题】The little children did not know how much to pay for the candy, and the grocer took______them.
A.
after
B.
account of
C.
advantage of
D.
back
【简答题】It was clear that the small grocer was _____ people heowed money to. A. at the expense of B. at the risk of C. in the way of D. at the mercy of
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