【mobile phone supported】Supports videos, chapter tests, documents, live broadcasts, homework, and exams of [Chaoxing], [Xueyin Online]; scripts can be started with one click, run automatically on a single page, and can be minimized and run without interruption; does not occupy network speed or traffic; [300 millions questions] covers 99% of questions, supports single-choice, multiple-choice, fill-in-the-blank, judgment [picture questions, programming questions, listening questions]
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题库没有有效期,购买了以后可以长期使用
题库充值了是永久的吗,还是说只管一个月