电路一般有以下部分组成()。
A.电池,开关,灯泡
B.电源,负载和中间环节
C.直流稳压电源,开关,灯泡
D.电源,负载,电线
参考答案:B
当手部被大量HIV阳性血液污染时,应()
A.反复洗手
B.用肥皂水浸泡双手
C.先洗手,再用0.5%碘伏溶液搓洗5分钟
D.先用0.5%碘伏溶液搓洗5分钟,再洗手
E.采用外科洗手消毒法
Three weeks after the suicide bombing, the police were still hunting for bombers for they believe more were ______.
A.on the verge
B.on the sly
C.on the spot
D.on the loose