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问题 不定项选择

某行星沿椭圆轨道运行，远日点离太阳的距离为a，近日点离太阳的距离为b，过远日点时行星的速率为vA，则过近日点时的速率为

[ ]

A.vb=va

B.vb=va

C.vb=va

D.vb=va

答案

答案：C

单项选择题

咳嗽气急，胸部闷痛，痰吐脓痰腥臭者，宜选用

A．清金化痰汤

B．如意解毒散

C．加味桔梗汤

D．千金苇茎汤

E．沙参清肺汤
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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.

the popular XML（）have not reached a point where their tree views.

A．texts

B．editors

C．creators

D．tags
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