["1. 甲醇精製版の安全は一題。","B. 良好的坐姿是：身体前倾，身体靠近工作台。A. 坐直 B. 前傾 C. 後靠","C. 所有人在小学时，老师都教过：上课要坐直了A不能弯腰驼背。所以A答案一定是A。"
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良好的坐姿是：身体( )，靠近工作台。 A. 坐直 B. 前倾 C. 后靠
所有人在小学时，老师都教过：上课要坐直了，不能弯腰驼背。所以，答案一定是A。
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