首选何方治疗
A．理中丸加减
B．小建中汤加减
C．少腹逐瘀汤加减
D．香苏散合良附丸
E．良附丸合正气天香散
参考答案：B
不能阻滞钠通道的抗心律失常药物是
A．奎尼丁B．利多卡因C．普罗帕酮D．普萘洛尔E．胺碘酮
The owner of a firm gathers some information about her business. This year the firm's revenue is $300000. Cash expenses are $170000. Normal profit is $70000. Economic depreciation is $20000. If the owner could have earned $30000 per year in wages working for another company, the firm's economic profit is closest to:（）
A. $10000
B. $30000
C. $60000
