zhè / cì / kǎo / shì / kě / yǐ / kāi / juàn / dà / jiā / bú / yòng / bǎ / suǒ / yǒu / gōng / shì / dōu / bèi / xià / lái这次考试可以开卷,大家不用把所有公式都背下来。This exam is open-book, so no one needs to memorize all the formulas.