下列关于水泥粉煤灰碎石桩的说法中,表述正确的是() A.轻型井点管的安装应居中,并保

题型:多项选择题

问题:

下列关于水泥粉煤灰碎石桩的说法中,表述正确的是()

A.轻型井点管的安装应居中,并保持水平

B.轻型井点降水应使地下水水位降至沟槽底面位臵

C.轻型井点的集水总管底面及抽水设备的高程宜尽量降低

D.在施工排水过程中不得间断排水,并应对排水系统经常检查和维护

E.冬期施工时,排水系统的管路应采取防冻措施

考点:施工员施工员(市政方向)施工员(市政方向)题库
题型:多项选择题

请根据下图回答问题:

(1)图中标有①②的仪器名称:①______.②______.

(2)用石灰石和稀盐酸制取二氧化碳的化学方程式是______.可选用图中______ 和______(填序号)组装一套制取二氧化碳的装置.检验二氧化碳集满的方法是______.

(3)把装置A和装置C相连组成一套装置,该装置可制取的一种气体是______,该反应的化学方程式为______.

(4)相同条件下,氨气(NH3)的密度比空气小,且易溶于水;加热,氯化铵和氢氧化钙固体混合物可制取氨气.则制取氨气应选择的装置是______(填序号).

题型:多项选择题

下列各项工作中,不属于施工阶段的工作是( )。

A.投资准备

B.施工准备

C.生产准备

D.组织施工

题型:多项选择题

在成本加成定价法中,贷款利率的组成部分包括()。

A.筹集可贷资金的成本

B.银行非资金性的营业成本

C.银行对战略风险所要求的补偿

D.银行对贷款违约风险所要求的补偿

E.每笔贷款的预期利润

题型:多项选择题

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 mail 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 mail 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 mail.
Many senders of unsolicited commercial electronic mail 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 mail 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 mail cannot be solved by the government alone. The development and adoption of technological approaches and the pursuit of cooperative efforts with other countries will be necessary as well.

What does unwanted e-mail messages do to the providers of the Internet services

A.Raising their cost.

B.Raising the Internet speed.

C.Improving their business.

D.Attracting investment.

题型:多项选择题

氯丙嗪阻断结节漏斗多巴胺通路的D2受体导致锥体外系反应。()

更多题库