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【单选题】
关于微管的组装,哪种说法是错误的A.
微管可随细胞的生命活动不断的组装与去组装
B.
微管的组装分步进行
C.
微管蛋白的聚合和解聚是可逆的自体组装过程
D.
微管两端的组装速度是相同的
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举一反三
【单选题】Say that a monopolist is currently operating on the inelastic region of its demand curve. To maximize its profits, it should:
A.
raise its prices.
B.
lower its prices.
C.
maintain its current price.
D.
either raise or lower its prices, depending on how high its marginal cost curve is.
【单选题】Because postage rates are rising, Home Decorator magazine plans to maximize its profits by reducing by one half the number of issues it publishes each year. The quality of articles, the number of arti...
A.
With the new postage rates, a typical issue under the proposed plan would cost about one-third more to mail than a typical current issue would.
B.
The majority of the magazine's subscribers are less concerned about a possible reduction in the quantity of the magazine's articles than about a possible loss of the current high quality of its articles.
C.
Many of the magazine's long-time subscribers would continue their subscriptions even if the subscription price were increased.
D.
Most of the advertisers that purchase advertising space in the magazine will continue to spend the same amount on advertising per issue as they have in the past.
E.
Production costs for the magazine are expected to remain stable.
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