作业场所氧含量低于( )时,严禁人内以免造成窒息事故。A.18% B.21% C. 发布时间:2018-07-21 01:47 │ 来源:www.tikuol.com 题型:单项选择题 问题: 作业场所氧含量低于( )时,严禁人内以免造成窒息事故。A.18%B.21%C.30%D.15%
题型:单项选择题 疫苗生产企业、疫苗批发企业在销售疫苗时应提供的证明文件有()。A.由药品检验机构依法签发的生物制品每批检验合格或者审核批准证明复印件B.由药品监督管理机构依法签发的生物制品每批检验合格或者审核批准证明复印件,并加盖企业印章C.由药品检验机构依法签发的生物制品每批检验合格或者审核批准证明复印件,并加盖企业印章D.由药品监督管理机构依法签发的生物制品每批检验合格或者审核批准证明复印件E.由药品检验机构依法签发的生物制品每批检验合格或者审核批准证明原件,并加盖企业印章(2010年考试真 查看答案
题型:单项选择题 Which of the following is NOT true according to the passage().A.Andrew Carnegie became the wealthiest men in America by his hard work.B.Andrew Carnegie’s noteworthy contributions to society are those that bear his name.C.Most Americans have benefited from Andrew Carnegie’s generosity.D.Libraries donated by Andrew Carnegie formed the basis of the public library system. 查看答案