采购人、采购代理机构对政府采购项目每项采购活动的采购文件应当妥善保存，保存期限为( )。
A. 3年
B. 5年
C. 10年
D. 15年
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下列关于我国区际司法协助的说法正确的是哪项( )
A. 内地向香港送达司法文书，由最高人民法院委托香港特别行政区高等法院进行
B. 委托送达司法文书的费用一律全免
C. 黄某于2001年于珠海犯诈骗罪，后逃至澳门，2004年因某一合同违约纠纷案赴珠海作证，逗留15天，在此期间，不得因前述诈骗罪对其起诉、羁押
D. 台商王某申请认可台湾地区有关法院的民事判决的，应在判决生效6个月内提出
It was in ______ that he decided to dedicate his life to the struggle against racial oppression.
A. Harvard
Barington
C. Fisk
D. Washington
Du Bois's family was respected in the village because ______.
A. the Civil War had eliminated racial discrimination in the U.S.
B. his grandmother could recite the history of the western world
C. Du Bois was considered something of a prodigy and very promising
D. his great-grandfather had fought in the American war of independence
以下对易燃、易爆危险品的保管方法叙述不正确的是( )
A. 应分类堆放
B. 严禁烟火，不准明火操作
C. 危险品的封口必须坚实、牢固、密封
D. 钾、钠等金属应存放于煤油中
E. 严格不得与其他药品同库贮存
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