搜题请搜索小程序“爱下问搜题”
问题 单项选择题

手术中为何常用第Ⅱ导联监测心电图()

A．无需接地线

B．比第Ⅲ导联容易分析

C．心室复合波描画的最好

D．能观察到心房收缩的最大波幅

E．导联连接在左下肢和右上肢

答案

参考答案：D

问答题 案例分析题

工厂变电所380V侧母线采用80×10mm2铝母线，水平平放，两相邻母线轴线间距离为200mm，档距为0．9m，档数大于2。该母线上装有1台500kw的同步电动机，cosα=1时，ηN=94％。试校验此母线的动稳定性。
查看答案
单项选择题

An analyst does research about free cash flow and gathers the following information about a company:
·Cash provided by operating activities is $22000
·Cash used for fixed capital expenditures is $6000
·Net debt repayment is $850
·Interest paid is $3000
·Income tax rate is 35%
·Depreciation and amortization is $1000
The free cash flow to the firm is closest to:（）

A. $16950

B. $17950

C. $18950
查看答案