下列物体中,属于导体的是( )
A.木制刻度尺
B.金属小刀片
C.玻璃茶杯
D.橡胶手套
木制刻度尺、玻璃茶杯和橡胶手套都是绝缘体,金属小刀片是导体,所以选项B正确;
故选B.
男性,23岁,冬季用煤炉取暖,晚餐食用自制咸菜,并有饮酒,1.5小时后出现中上腹痛伴恶心、呕吐,有胸闷、心悸、乏力。体检:神志清,有口唇发绀,瞳孔正常大小,皮肤干燥
其主要治疗措施是()
A.小剂量亚甲蓝静注
B.足量阿托品静注
C.纳洛酮静脉注射
D.面罩吸氧
E.大量输液
In case Customs duties are short--levied or not levied on import or export, the Customs may, within ______ after the date of payment of Customs duties or the date of relesse of the goods, recover the amount of Customs duties short-levied or not levied.
A.six months B.one yearC.two yearsD.four years