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【单选题】
苯二氮䓬类药物的作用特点A.
作用部位主要在脑干网状结构
B.
对大脑损伤引起的肌肉僵直无作用
C.
小剂量药物无抗焦虑作用
D.
停药后代偿性反跳较明显
E.
对快动眼睡眠时相影响小
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举一反三
【单选题】In a competitive market,
A.
only a few sellers sell the same product.
B.
each seller has limited control over the price of his product.
C.
if one buyer chooses to purchase a large quantity of the product, the price will rise.
D.
if one seller withholds his product from the market, prices will rise.
【单选题】If a perfectly competitive industryis in long- run equilibrium, all frms
A.
have equal marginal costs.
B.
) have identical supply curves.
C.
operate at the point where marginal cost is greater than averagetotal costs.
D.
have identical plant sizes.
【单选题】衡量人生的社会价值的重要标准是( )
A.
树立什么样的人生目的
B.
个人对社会和他人所做的贡献
C.
什么样的人生态度指引人生道路
D.
个人从社会和他人那里得到的尊重和满足
【单选题】衡量人生的社会价值的重要标准是( )
A.
树立什么样的人生目的
B.
个人对社会和他人所做的贡献
C.
以什么样的人生态度指引人生道路
D.
个人从社会和他人那里得到的尊重和满足
【单选题】If a firm buys its labor in a competitive market, then a short-run increase in the price of the firm's output will cause the firm to
A.
offer a higher wage.
B.
hire fewer workers.
C.
hire more workers.
D.
offer a lower wage.
【简答题】佣金,酬金
【单选题】If a perfectly competitive market is in long-run equilibrium and there is a permanent decrease in demand, then
A.
some firms will incur economic losses.
B.
firms are no longer maximizing profits.
C.
some firms must immediately exit.
D.
each firm must produce less output in the new long run equilibrium and earn less economic profit.
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