更多“关系数据库中能实现的专门关系运算包括【4】、连接和投影。”相关的问题
提高早期胃癌诊断率的关键性是( )。
A.纤维胃镜检查,胃液细胞学检查,X线钡餐检查 B.胃液细胞学检查,粪便隐血试验,纤维胃镜检查 C.胃液细胞学检查,粪便隐血试验,X线钡餐检查 D.纤维胃镜检查,胃液酸碱度检查,X线钡餐检查 E.纤维胃镜检查,粪便隐血试验,X线钡餐检查
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纵坡超过15%,又要通行车辆,将斜面作成锯齿形坡道的园路附属构筑物称为()。
A.台阶 B.磴道 C.礓礤 D.汀步
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一患者表现为咳嗽声重,咳痰稀薄色白,鼻塞,流清涕,恶寒发热、无汗等症,宜用
A.川贝枇杷颗粒B.风热咳嗽颗粒C.复方枇杷叶膏D.蛇胆川贝胶囊E.通宣理肺丸
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以下属于违反实名制规范的有()
A.哥哥用自己身份证帮弟弟办卡
B.哥哥用弟弟身份证帮弟弟办卡
C.弟弟用自己的身份证给自己办卡
D.弟弟用哥哥的身份证给自己办卡
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《礼》是综合()形成的。
A.天道人情
B.人伦关系
C.物质分配
D.等级秩序
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某病房楼工程,地下1层,地上12层,框架剪力墙结构,施工单位中标后正常组织了施工,结构施工至五层时,市安监站对该项目进行了全面检查,检查过程中发生了以下事件: 事件一:在施工现场检查时检查人员发现:临时木工加工棚面积约90m2,配置了2只灭火器,场区消防水进口在东北角,有一处手提式灭火器直接放在仓库的地面上,现场消防车道的宽度为3.8m;针对上述情况检查人员要求整改。 事件二:在生活区检查时发现:食堂师傅正在做饭,在离灶台2.0m处放置了液化气瓶,有个别宿舍工人围着电炉取暖。 事件三:检查人员在检查资料时发现,项目部在工人施工作业前消防安全技术交底不完善。工人施工作业前,消防安全技术交底应包括哪些内容?
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ZYBAN Tablets (药片) l. ZYBAN is a prescription (处方) medicine to help people quit smoking. Studies have shown that more than one third of people quit smoking for at least one month while taking ZYBAN. For many patients, ZYBAN reduces withdrawal symptoms (脱瘾过程中产生的症状) and the strong wish to smoke. 2. ZYBAN should be taken as directed by your doctor. The usual recommended dosing (剂量) is to take one 150-mg tablet in the morning for the first 3 days. On the fourth day, begin taking one 150-mg tablet in the morning and one 150-mg tablet in the early evening. Doses should be taken at least 8 hours apart. 3. For most patients, treatment will last 7 to 12 weeks. Because results vary, it may take longer for some people, Possibly up to 6 months depending on the individual. If you've been smoking for a long time, ZYBAN will help to reduce withdrawal symptoms. It's important to remain on ZYBAN for at least 7 to 12 weeks in order to quit for good. Your doctor should determine when to stop taking ZYBAN 4. It takes about 1 week for ZYBAN to reach the right levels in your body to be effective So, to increase your chance of quitting as much as possible, you should not stop smoking until you have been taking ZYBAN for 1 week. You should set a date to stop smoking during the second week you're taking ZYBAN. 5. The side effects (副作用) associated with ZYBAN are generally mild and often disappear after a few weeks. The most common side effects are dry mouth and difficulty in sleeping. If you have difficulty sleeping, avoid taking your medicine too close to bedtime.A. What is ZYBAN?B. What are the side effects of taking ZYBAN? . C. Who invented ZYBAN?D. How long should I take ZYBAN?E. How long does it take for ZYBAN to work?F. How should I take ZYBAN?Paragraph 2 ______
A.B.C.D.A.
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中石油所属企业应当制定重大危险源事故应急预案演练计划,重大危险源专项应急预案()至少进行一次演练,重大危险源现场处置方案()至少进行一次演练。
A.每年、每年
B.每半年、每年
C.每年、每半年
D.每半年、每半年
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越鞠丸的组成中含有
A.木香
B.栀子
C.神曲
D.川芎
E.苍术
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电动潜油泵井接线盒的作用是()(电动机正、反转)。
A.检查
B.方便测量机组的参数
C.检测
D.及调整三相电源相序
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制备雄黄的方法是()
A.提净法 B.煨法 C.水飞法 D.干馏法 E.烘焙法
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为什么简单增量调制的抗误码性能优于线性脉冲编码调制?
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当某单项工程竣工结算报告金额为1500万元时,审查时限应从接到竣工结算报告和完整的竣工结算资料之日起()天。
A . A.20
B . B.30
C . C.45
D . D.60
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