心绞痛及昏厥常见于:() A.二尖瓣狭窄 B.二尖瓣关闭不全 C.主动脉瓣狭窄 D. 发布时间:2019-01-08 13:50 │ 来源:www.tikuol.com 题型:单项选择题 问题: 心绞痛及昏厥常见于:()A.二尖瓣狭窄B.二尖瓣关闭不全C.主动脉瓣狭窄D.主动脉瓣关闭不全E.三尖瓣狭窄
题型:单项选择题 在如图所示的电路中,R1=18Ω,R2=10Ω,当a、b两点间接理想电流表时,其读数为0.5A,当a、b两点间接理想电压表时,其读数为3.6V,则该电源的电动势为__________ V,内电阻为__________Ω。 查看答案
题型:单项选择题 坚持学校教育、家庭教育、社会教育相结合应()A.发挥学校主阵地作用B.根据不同学段学生身心发展特点,区分层次,突出重点C.加强各学段的有机衔接,逐步推进D.加强家庭、社会与学校之间的配合,形成教育合力 查看答案
题型:单项选择题 Fifty-three thousand shouting enthusiasts filled the stadium; they had come to watch the first game of the season and to cheer the home team.A.enthusiasts filled the stadium to comeB.enthusiasts, filling the stadium, had comeC.enthusiasts filled the stadium; and had comeD.enthusiasts filling the stadium, who had come 查看答案