1. Some are ‘thermoplastic’, which means that, like candlewax, they melt when heated and can then be reshaped.(剑5, Test 2 passage 1)
分析：
本句的主句为“Some are ‘thermoplastic’”; “which means that, like candlewax, they melt when heated and can then be reshaped.”（定语从句）做‘thermoplastic’的定语，关系词为which; 在此定语从句中“that, like candlewax, they melt when heated and can then be reshaped.” 为that引导的宾语从句，做means的宾语;“when heated”为过去分词短语做状语，做they melt的时间状语。
2. Baekeland’s interest in plastics began in 1885 when, as a young student in Belgium, he embarked on research into phenolic resins, the group of sticky substances produced when phenol (carbolic acid) combines with an aldehyde (a volatile fluid similar to alcohol). (剑5, Test 2 passage 1)
分析：
本句的主句为“Baekeland’s interest in plastics began”; in 1885为时间状语，而“when, as a young student in Belgium, he embarked on research into phenolic resins”为定语从句，做1885的定语，关系词为when; “the group of sticky substances”为phenolic resins的同位语;“produced when phenol (carbolic acid) combines with an aldehyde (a volatile fluid similar to alcohol”为过去分词短语做定语，做the group of sticky substances的定语，而“when phenol (carbolic acid) combines with an aldehyde (a volatile fluid similar to alcohol).”为when引导的时间状语从句。
3. The problem of how health-care resources should be allocated or apportioned, so that they are distributed in the most just and efficient way, is not a new one.(剑4, test4 passage 3)
分析：
本句的主句为“The problem is not a new one”;“how health-care resources should be allocated or apportioned, so that they are distributed in the most just and efficient way”为how引导的宾语从句，做of的宾语;“so that they are distributed in the most just and efficient way”为so that引导的目的状语从句。
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