• 2022-06-06
    The black boxes are placed in an insulated (隔绝的) containers.
    未知类型:{'label': 'questionDesc', 'content': '请指出以下句子中的错误。', 'isMemberControl': 0, 'type': 181}
    未知类型:{'label': 'source', 'content': '粉笔英语独家模拟卷 四级仔细阅读2', 'isMemberControl': 0, 'type': 181}
    A: placed in
    B: insulated
    C: containers
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