--what have the scientists found?--They've found how fat___and stored.
A produced B is produced C is producing D has produced 选择哪项?为什么?怎么译?
人气：122 ℃ 时间：2020-03-28 15:28:51
解答
B is produced
——科学家们发现了什么?
——他们发现了脂肪是如何产生和存储的.
描述客观事实用一般现在时.脂肪不是自然而然,而是“被”产生的.应该用被动.
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