Primary batteries or cells are _______ , once discharged, are discarded.A、those

游客2023-11-22 61

问题 Primary batteries or cells are _______ , once discharged, are discarded.

选项 A、those
B、those that
C、that
D、that they

答案 B

解析指示代词指代复数名词词组：“primary batteries or cells”。

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