皮皮学，免费搜题
登录
搜题
【单选题】
病人，女，69岁，心前区疼痛5小时，心电图示急性广泛前壁心肌梗死伴室性早搏。入院体检：气急不能平卧，血压130/80mmHg，心率176次/分。两肺散在细湿啰音，伴少许哮鸣音。肝颈静脉回流征阴性。 入院后即查血清酶，下列哪种心肌酶诊断的特异性最高（ ）。A.
肌酸磷酸激酶(CPK)
B.
肌酸磷酸激酶同工酶(CK-MB)
C.
氨酸氨基转移酶(AST)
D.
碱性磷酸酶(AKP)
E.
乳酸脱氢酶(LDH)
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】a旋律小调上行音阶的导音是:
【单选题】Excess capacity occurs in long-run equilibrium under monopolistic competition so that:
A.
price is less than marginal cost.
B.
price exceeds minimum average cost.
C.
marginal revenue exceeds price.
D.
all of the above occur.
【单选题】Long-run equilibrium under monopolistic competition is similar to long-run equilibrium under perfect competition in that:
A.
price equals the minimum average total cost.
B.
firms face perfectly elastic demand curves.
C.
price equals average cost.
D.
marginal revenue equals average cost.
【单选题】Under oligopoly, firms' pricing policies are ________ and, under monopolistic competition, they are ________.
A.
interdependent; independent
B.
independent; interdependent
C.
cooperative; uncooperative
D.
uncooperative; cooperative
E.
profit maximizing; revenue maximizing
【单选题】Which of the following is not true of long run equilibrium under monopolistic competition?
A.
Price equals marginal cost.
B.
Price equals average cost.
C.
Price equals minimum average total cost.
D.
None of the above.
【单选题】A firm in long-run equilibrium under monopolistic competition will earn
A.
zero economic profits because of free entry.
B.
positive monopoly profits because each sells a differentiated product.
C.
positive oligopoly profits because each firm sells a differentiated product.
D.
negative economic profits because it has economies of scale.
E.
positive economic profit if it engages in international trade.
相关题目：
参考解析：
知识点：
题目纠错 0
发布
