盲板直径=0.318×S+2×H-10（mm）公式中的“S”代表（）
A、管道外圆周长
B、盲板周长
C、厚度
参考答案：A
It was the third time that she_____ to this mountain village to see the children. [ ]
A. had come
B. has come
C. came
D. would come
引起虚热的的病机是
A．阳盛B．阴盛C．阳虚D．阴虚E．以上均非
