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【单选题】
胶体金间接免疫层析法测血清抗体，常设计免疫层析法的主要目的A.
缩短反应时间
B.
减少样品用量
C.
提高灵敏度
D.
提高特异性
E.
减少血清中非特异性免疫球蛋白对实验结果干扰
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【单选题】You will find me online almost always, so there______ be any difficulty reaching me.
A.
must
B.
would
C.
shouldn’t
D.
needn’t
【单选题】I think this bike is a little better than that one, but the shopkeeper charged me almost_______ for it.
A.
as many twice
B.
twice as many
C.
twice as much
D.
as much twice
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【单选题】The new English dictionary I bought yesterday ________ me almost twenty yuan. A spent
A.
47 . The new English dictionary I bought yesterday ________ me almost twenty yuan. A spent
B.
paid
C.
cost
D.
took
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