TOEFL Reading: ETS-TOEFL阅读机经 - 4L5CCN1RSE9DW1F5L$

According to paragraph 5, all of the following are true of the water emitted by undersea hydrothermal vents EXCEPT A. It has very high temperature. B. It includes a dissolved form of iron. C. It releases hydrogen as it rises to the surface at low rate. D. It creates iron sulfide when it hits the surrounding ocean.