• 2022-06-19
    What is the finding of the new study?
    未知类型:{'label': 'questionDesc', 'content': '请根据材料选择正确答案。', 'isMemberControl': 0, 'type': 181}
    未知类型:{'label': 'source', 'content': '2019年12月 四级 卷二 仔细阅读2', 'isMemberControl': 0, 'type': 181}
    A: Quick-cooking microwave ovens have become more popular.
    B: The frequent use of microwaves may do harm to our health.
    C: CO2 emissions constitute a major threat to the environment.
    D: The use of microwaves emits more CO2 than people think.
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