原题
录音 1
According to the speaker, what did people before the mid-1800s believe about the deep ocean floor?
AThat there were no living organisms there
BThat seawater froze in the cold, high-pressure conditions there
CThat only simple, one-celled organisms could survive there
DThat it was inhabited mainly by creatures like starfish and corals
正确答案：A
解题思路
老师暂未填写解题思路。