搜题请搜索小程序“爱下问搜题”
问题 选择题

氧化还原反应与四种基本类型反应的关系如右图所示，则下列化学反应属于3区的是（  ）。

A．Cl2+2KBr===Br2+2KCl

B．HCl + NaOH====NaCl+H2O

C．4Fe(OH)2+O2+2H2O===4Fe(OH)3

D．2Na2O2+2CO2===2Na2CO3+O2

答案

答案：B

由图可知3区为复分解反应，且一定不是氧化还原反应，而A中氯元素、C中铁元素、D中—1价氧元素化合价均有变化是氧化还原反应，答案选B。

单项选择题

抗原抗体结合出现肉眼可见反应()

A．与抗体分子量的大小密切相关

B．与抗体的类型密切相关

C．与抗体的亲和力密切相关

D．与抗原抗体的比例密切相关

E．与抗体的亲和力密切相关
查看答案
单项选择题

SOX is an alternative syntax for (71) . It is useful for reading and creating XML content in a text editor. It is then easily transformed into proper XML. SOX was created because developers can spend a great deal of time with raw XML. For many of us, the popular XML (72) have not reached a point where their tree views, tables and forms can completely substitute for the underlying. (73) language. This is not surprising when one considers that developers still use a (74) view, albeit enhanced, for editing other languages such as Java. SOX uses (75) to represent the structure of an XML document, which eliminates the need for closing tags and a number of quoting devices. The result is surprisingly clear.

A．markup

B．command

C．programming

D．interactive
查看答案