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【简答题】
记等差数列的前 为 ，若 ，则该数列的公差 ___________
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皮皮学刷刷变学霸
举一反三
【简答题】操作系统的基本特性是( )、( )、( )、( )。
【简答题】When the pressure gets low, the boilling-point becomes low.
【简答题】操作系统的基本特性是
【简答题】操作系统的基本特性是 、 、 、和 。
【单选题】When the costs of supplies increase in an industry, the low-cost leader
A.
may continue competing with rivals on the basis of product features.
B.
will lose customers as a result of price increases.
C.
will be unable to absorb higher costs because cost-leaders operate on very narrow profit margins.
D.
may be the only firm able to pay the higher prices and continue to earn average or above- average returns.