男，61岁。冠心病心肌病伴左心衰竭入院，应用洋地黄二周后出现频发多源性室性早搏。患者

将两个定值电阻R₁与R₂并联接入电路中，已知R₁：R₂=3：5，则R₁与R₂两端电压之比为________。

涡流导电仪能用于探伤吗？为什么？

Peter Welsh, CFA, gathered the following information from a company's most recent financial statements ( U.S. $ in millions):

Welsh also determined that the company uses the LIFO inventory method, but most companies in the industry use the FIFO method. The footnotes to the financial statements indicate that if the company had used the FIFO method, the inventory balance would have been $ 50 million higher than the amount reported on the company's most recent financial statements. If the company's common stock is currently selling for $70 per share, the most appropriate price to book value ratio to use in valuing the company is:()

A. 2.22.

B. 2.03.

C. 2.16.

滞期费

阅读下列语段，回答文后问题：姚纳沉默了一忽儿，接着说：“是这么回事，小母马……库司玛·姚尼奇下世了……他跟我说了再会……他一下子就无缘无故死了……哪，打个比方，你生了个小驹子，你就是那小驹子的亲妈了……突然间，比方说，那小驹子跟你告别，死了……你不是要伤心吗？……”那匹瘦马嚼着干草，听着，闻闻主人的手……姚纳讲得入了迷，就把他心里的话统统对它讲了……

本语段的出处、文体名称及作者是（）。

A.《库司马·姚尼奇》，短篇小说，契诃夫

B.《门槛》，散文诗，屠格涅夫

C.《苦恼》，短篇小说，契诃夫

D.《马》，寓言体小说，屠格涅夫