【简答题】我国政府审计的起源,基于西周的______。
【简答题】英译中 If, on the other hand, producing more of a commodity results in reducing its cost, this will tend to increase the supply offered by seller-producers, which in turn will lower the price and permit ...
【单选题】柯斯质粒(cosmid)是一种 ( )载体
A.
由λ -DNA 的 cos 区与质粒重组而成的载体
【单选题】柯斯质粒 (cosmid) 是一种人工建造的载体,下列对它描述不正确的是( )。
【单选题】When the opportunity cost of producing more of a good is increasing, the marginal cost of producing more of the good is
D.
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