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- UID
- 223453
- 帖子
- 304
- 主题
- 8
- 注册时间
- 2011-7-11
- 最后登录
- 2016-4-19
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| This is becoming a popular topic. I used a pen because I don't write very hard and pencil is much more impermanent. It was a holy mess at times but I always circle my final answer amid the wreckage a pen will do on a reworked quantitative problem or essay! |
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发表于 2011-7-18 15:59
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