Which of the following is TRUE according to Para. 1?

A.Nowadays, scientists pictured the circulation of ocean's water mass as consisting of large slow-moving currents. B.Before 1965 ,the concept of scientists produced only a rough approximation of the true circulation. C.Researchers began to do research on the developed techniques and equipment. D.These instruments disclosed an expected level of variability in the deep ocean.

时间:2023-10-08 13:17:50

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