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问题 单项选择题

腐殂污泥来自生物膜法的二沉池，属于生物污泥，含水率低于剩余污泥，一般为()。

A.90%～93%

B.93%～95%

C.95%～97%

D.96%～98%

答案

参考答案：A

不定项选择

一质点做匀变速直线运动，通过A点时的速度为vA，经过时间t通过B点时速度为vB，再经过相同时间t通过C点时速度为vC，则关于物体通过B点时的速度vB和物体的加速度a的关系式，正确的是[ ]

A．

B．

C．

D．

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单项选择题

SOX is an alternative（）for XML. It is useful for reading and creating XML content in a（）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（）have not reached a point where their tree views, tables and forms can completely substitute for the underlying（）language. This is not surprising when one considers that developers still use a text view, albeit enhanced, for editing other languages such as Java. SOX uses（）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.

SOX uses（）to represent the structure of an XML document,which eliminates the need for closing tags and a number of quoting devices.

A．indenting

B．structure

C．framework

D．bracket
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