题目内容
（请给出正确答案）
[主观题]
Which of the following is TRUE according to Para. 1？A．Nowadays, scientists pictured the ci
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.
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