We should put away all medicines out of reach of children and make sure they are not left ________.

A．lie round

B．laying around

C．lain round

D．lying around

属于一类医疗器械产品的是

A．一次性使用无菌注射器
B．煮沸消毒器
C．体重秤
D．婴儿奶瓶
E．医用脱脂棉