更多“属于差压式测量的为（）。”相关的问题
氧指数是指在规定的条件下，材料在（）混合气流中进行有焰燃烧所需的最低氧浓度。以氧所占的体积百分数的数值来表示。
A.氧气氮气 B.氧气氦气 C.氮气空气 D.空气氦气
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“吴王从台上观，见且斩爱姬”（《史记.孙子列传》）中，“观”读去声。
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车辆外观检查车长大于（）m的长途客车和旅游客车是否安装了符合规定的汽车行驶记录仪.
A.7m
B.9m
C.6m
D.4m
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Electronic mail has become an extremely important and popular means of communication. The convenience and efficiency of electronic mail are threatened by the extremely rapid growth in the volume of unsolicited commercial electronic mail. Unsolicited commercial electronic mail is currently estimated to account for over half of all electronic mall traffic, up from an estimated 7 percent in 2001, and the volume continues to rise. Most of these messages are fraudulent or deceptive in one or more respects. The receipt of unsolicited commercial electronic mail may result in costs to recipients who cannot refuse to accept such mail and who incur costs for the storage of such mail, or for the time spent accessing, reviewing, and discarding such mail, or for both. The receipt of a large number of unwanted messages also decreases the convenience of electronic mall and creates a risk that wanted electronic mail messages, both commercial and noncommercial, will be lost, overlooked, or discarded amidst the larger volume of unwanted messages, thus reducing the reliability and usefulness of electronic mail to the recipient. Some commercial electronic mail contains material that many recipients may consider vulgar or pornographic in nature. The growth in unsolicited commercial electronic mail imposes significant monetary costs on providers of Internet access services, businesses, and educational and nonprofit institutions that carry and receive such mail, as there is a finite volume of mail that such providers, businesses, and institutions can handle without further investment in infrastructure. Many senders of unsolicited commercial electronic mail purposefully disguise the source of such mall. Many senders of unsolicited commercial electronic mall purposefully include misleading information in the messages' subject lines in order to induce the recipients to view the messages. While some senders of commercial electronic mail messages provide simple and reliable ways for recipients to reject (or 'opt-out' of) receipt of commercial electronic mall from such senders in the future, other senders provide no such 'opt-out' mechanism, or refuse to honor the requests of recipients not to receive electronic mail from such senders in the future, or both. Many senders of bulk unsolicited commercial electronic mail use computer programs to gather large numbers of electronic mail addresses on an automated basis from Internet websites or online services where users must post their addresses in order to make full use of the website or service. The problems associated with the rapid growth and abuse of unsolicited commercial electronic mall cannot be solved by the government alone. The development and adoption of techno-logical approaches and the pursuit of cooperative efforts with other countries will be necessary as well.According to the passage, efficiency of e-mail is threatened by ______A．heavy e-mail trafficB．fraudulent e-mail messagesC．large volume of messagesD．increasing amount of unwanted e-mail
A.B.C.D.E.F.G.AccordingH.heavyI.fraudulentJ.largeK.increasing
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土默特部在（）统领时期最为昌盛，其核心归化城成为蒙古右翼的政治经济中心。
A.阿勒坦汗
B.火筛
C.林丹汗
D.达延汗
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SYSAUX表空间是强制的。如果尝试执行一个CREATE DATABASE命令，但没有为SYSAUX表空间指定数据文件，会发生什么
A．该命令会失败B．该命令会成功，但数据库不能运转，直到创建了SYSAUX表空间为止C．创建默认的SYSAUX表空间和数据文件D．SYSAUX对象在SYSTEM表空间中创建
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溴丙胺太林主要用于
A. 过敏性休克 B. 散瞳，验光 C. 十二指肠溃疡，胃肠绞痛 D. 心动过缓 E. 全麻前给药
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下列选项中，( )不是兴奋剂。 A．咖啡因 B．尼古丁 C．可卡因 D．安定
A.咖啡因
B.尼古丁
C.可卡因
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擅自配制和出售麻醉药品制剂的______
A.没收全部麻醉药品和非法收入，并视情节轻重给予从罚款到吊销相应《许可证》的不同处罚
B.由其所在单位给予行政处分
C.由公安机关依照治安管理处罚条例给予处罚
D.由司法机关依法追究刑事责任
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{{*HTML*}}设方程组有解，则a1，a2，a3，a4满足的条件是___________．
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期货公司应当建立客户资料档案，在任何情况下都应当为客户保密。（）
A . 正确
B . 错误
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教学实施之前，相对来说，对学习者特征进行分析可以不需要考虑的因素是（）。
A.学生对戊戌变法这段历史过程的了解程度
B.学生发展的一般特征，例如思维能力、学习动机等
C.学生从视频、多媒体等课件中获取知识的能力
D.学生之间的历史知识差距
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病历摘要：某妇，30岁，孕0产0，因停经40+天、少量阴道流血1周来就诊，不伴腹痛。妇查：外阴阴道见少量咖啡色分泌物，宫颈光滑，着色而软，子宫前位稍大，无压痛，双附件（－）。其诊断下述哪项不正确？（）
A . A.先兆流产
B . 难免流产
C . 完全流产
D . 葡萄胎
E . 宫外孕未破型
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中央银行作为银行的银行，其主要职责主要有充当最后贷款人、集中保管存款准备金、主持全国银行间清算业务和开展公开市场业务。
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参考答案
十点题库官方参考答案
（由十点题库聘请的专业题库老师提供的解答）
