用石墨电极电解含有一定量重水(D2O)的水(H2O),下列说法正确的是 [ ]

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问题:

用石墨电极电解含有一定量重水(D2O)的水(H2O),下列说法正确的是 [ ]

A.相同状况下两电极上产生的气体体积之比为2∶1

B.两电极上产生的气体质量之比为8∶1

C.相同状况下两电极上产生的气体体积之比为4∶1

D.若两电极上产生的气体质量比为16∶3,则D2O与H2O的物质的量之比为1∶1

考点:电化学有关的计算
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从现行法律规定来看,解决劳动和社会保险行政争议的方式主要是()

A.行政仲裁、行政复议和行政诉讼

B.待遇复查、行政复议和行政诉讼

C.复查、仲裁和行政诉讼

D.调解、仲裁和行政诉讼

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先估后算.

例:2.96×32=?

估:3×300=900

算:2.96×32=94.72

(1)8.29×9=

(2)18.3×22=

(3)0.83×19=

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9个月男孩。6天来发热、咳嗽。2天来喘憋加重,1天来嗜睡,抽搐2次急诊。体温38.5℃,呼吸56次/分,心率160次/分,惊厥状态中,前囟膨隆,双肺有密集细湿啰音,肝肋下1.5cm,末梢血:白细胞4.4×109/L,血钙2mmol/L。脑脊液检查除颅压高外无其他异常。

最可能的诊断是()

A.肺炎合并化脓性脑膜炎

B.肺炎合并病毒性脑炎

C.肺结核合并结核性脑膜炎

D.肺炎合并中毒性脑病

E.真菌性脑膜炎

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DOM is a platform-and language- (21) API that allows programs and scripts to dynamically access and update the content, structure and style of WWW documents (currently ,definitions for HTML and XML documents are part of the specification). The document can be further processed and the results of that processing can be incorporated back into the presented (22) . DOM is a (23) -based AP1 to documents, which requires the whole document to be represented in (24) while processing it. A simpler alternative to DOM is the event-based SAX, which can be used to process very large (25) documents that do not fit info the memory available for processing.

A.text

B.image

C.page

D.graphic

题型:不定项选择题

导致消化性溃疡的主要因素之一是()

A.大肠杆菌

B.胰岛素分泌不足

C.幽门螺杆菌

D.消化道痉挛

E.白色念珠菌

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