在“乃知圣人止有三法,无第四法也”中,“止”之义为()
A.停住
B.只
C.同"之"
D.同"趾"
参考答案:B
在开采煤层群时,如果矿井瓦斯涌出量主要来自邻近层,则可由开采层向一定距离的顶(底)板其它煤层中打钻抽放,这种方法叫()。
Which of the following statements about a monopolist is least accurate()
A. The monopolist faces a downward sloping demand curve.
B. Unlike an oligopolist, a monopolist will always be able to earn economic profit.
C. A profit-maximizing monopolist will expand output until marginal revenue equals marginal cost.