GRE Reading Comprehension: OG/PP2-GRE阅读OG/PP2 - 62B3GWFZ83118Q6JP

The passage provides information on each of the following EXCEPT A. when the pull theory originated B. the amount of water a tall tree can transport C. the significance of water's tensile strength in the pull theory D. the role of the sun in the pull theory E. the mechanism underlying water's tensile strength