同型、同径水带并联系统压力损失可按流量平分法或阻力系数法进行计算。()
参考答案:对
He is a man of few words, and seldom speaks until _____ to.
A.spoken
B.speaking
C.speak
D.be spoken
乳痛根治术后,手指爬墙活动开始的时间是
A.术后1天B.术后3~5天C.术后6天D.术后7~10天E.术后14天