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UID1533206在线时间 小时注册时间2022-11-26最后登录1970-1-1主题帖子性别保密 
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| day 80 1. CR
 (1)B ✅
 ### Category: assumption
 - Reasoning:
 - safer road for cyclist. - increase sales
 ?safer  -  cycling
 (2) A ✅
 ### Category: conclusion
 - Reasoning:
 - fact1: LED energy-effective, longer lifespan,
 - fact2: cost higher
 2. RC
 - **Main Idea and structure:**
 - JP- T rex, detail, actually bigger,  gigantism,
 - recent: the reason=envir. ,
 SS - various factors model, ectothermic, warm-blood unsustainable, bigger for hunting B
 - ? - difficulty to examine theories/ fossil supports, expanding habitat
 D, D, B, C, C(b)
 知道b最接近,但是没敢选...
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