电压回路中性线应可靠接地，不应通过切换继电器触点切换。

简述肾结核的X线表现。

患者，女，20岁，心尖部听到一个舒张中期出现的先递减后递增型的隆隆样杂音，伴有第一心音增强；心律表现为节律不规则，第一心音强弱不一致，心率大于脉率现象。提示该患者的风湿性心脏瓣膜病是（）

A.二尖瓣狭窄

B.二尖瓣关闭不全

C.二尖瓣狭窄并关闭不全

D.二尖瓣狭窄并心房颤动

E.二尖瓣关闭不全并心房颤动

病变平面以下对侧痛温觉丧失，同侧深感觉丧失及上运动神经元瘫痪称为（）

A.Brown-Sequardsyndrome

B.Millard-Gublersyndrome

C.Jacksonsyndrome

D.Wallenbergsyndrome

E.Parinaudsyndrome

气象观测记录“比较性”指什么？

When I talked with my grandma on the phone, she sounded weak, but by the time we () up, her voice had been full of life.

A. were hanging

B. had hung

C. hung

D. would hang