Air Aheated on the surface of the earth tends to Braise as an Cinvisible column through surrounding Dcooler air.

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问题 Air Aheated on the surface of the earth tends to Braise as an Cinvisible column through surrounding Dcooler air.

选项 A、 
B、 
C、 
D、 

答案B

解析 Raise must have a direct object. This sentence has no direct object. Correction: rise.
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