皮皮学，免费搜题
登录
搜题
【单选题】
(69~71题共用题干) 病人,女,53岁。有冠心病病史、肥厚性心肌病。近日出现心悸、乏力、眩晕等症状,心电图检查连续出现3个室性期前收缩,诊断为室性心动过速。 71.该药对哪种心律失常无效A.
心房颤动
B.
心室颤动
C.
苷中毒所致的室性心律失常
D.
室性期前收缩
E.
心肌梗死所致的室性心律失常
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】为 实现均匀梯度的磁场,两块相同的磁铁(磁铁截面积及表面感应强度相同)相对位置,即N极与N极相对,两磁铁之间留一等间距间隙,霍尔元件平行于磁铁放在该间隙的中轴上。间隙大小要根据测量范围和测量灵敏度要求而定,间隙越小,磁场梯度就越大,灵敏度就 ( )
【简答题】According to the author, what is the central truth that tech executives should acknowledge if they want the tech world to move in the right direction?
【单选题】负序（逆序）继电器用于______，其作用是______。A．短路保护／保护发电机B．过载保护／保护电网C．逆功率保护／保护电网D．逆相序和断相保护／保护电网负载
A.
短路保护／保护发电机
B.
过载保护／保护电网
C.
逆功率保护／保护电网
D.
逆相序和断相保护／保护电网负载
【简答题】High-tech machines have made life easier for millions around the world．However, some people still prefer low-tech ways of doing things．Here’s an example of why this is happening．You can microwave a fr...
【简答题】阅读理解。 High-tech machines have made life easier for millions around the world. However, some people still prefer low-tech ways of doing things. Here's an example of why this is happening. You can micro...
【简答题】High-tech machines have made life easier for millions around the world. However, some people still prefer low-tech ways of doing things. Here’s an example of why this is happening. You can microwave a...
【单选题】如图所示 , 一有限范围的匀强磁场 , 宽度为 d , 将一边长为 l 的正方形导线框以速度 v 向右匀速地通过磁场区域 , 若 d > l , 则导线框中不产生感应电流的时间应等于 ( )
A.
d/v
B.
L/V
C.
(d-L)/v
D.
(d-2l)/v
相关题目：
参考解析：
知识点：
题目纠错 0
发布
