某灯具厂从1万件同批次产品中随机抽取了100件进行质检,发现其中有5件不合格,估计该厂这一万件产品中不合格品约为( )件。
500
He was a bit nervous. He _________his spare breath with a soft sound that was almost heard by the audience.
A.gave out
B.let out
C.picked out
D.blew out.
紫苏子治疗的病证是()
A.肺燥咳嗽
B.肺虚久咳
C.肺热咳嗽
D.百日咳
E.痰壅咳喘