当出厂水带有腐蚀性使管道产生铁锈沉积,特别是(),这种铁锈沉积严重。
A、流速高处
B、流速低或停滞水的管网末端
C、压力偏高处
D、压力偏低处
参考答案:B
三叉神经痛第一支取穴应为()
A.攒竹;四白;颧髎;丝竹空
B.四白;颧髎;下关;迎香
C.攒竹;鱼腰;阳白;丝竹空
D.颊车;下关;合谷;夹承浆
E.鱼腰;下关;迎香;合谷
When I got home last night, I was frightened to find that in front of my door____.
A.sit a dog
B.sat a dog
C.was a dog seated
D.did a dog sit