熔点管中的样品熔融后再冷却固化仍可用于第二次测熔点。
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用同样量溶剂分次萃取和一次萃取哪种效率高
A. 分次萃取
B. 一次萃取
C. 效率一样
Complete the following paragraphs with the qualifiers given.dynamic highly feasibleJohn Smith is a 1)______ experienced and 2)______ sales director who is proficient in developing new customers and improving customer retention. Her 3)______ strategic planning and customer relationship skills has resulted in increasing sales in the past three years.
Complete the following paragraphs with the qualifiers given.strong motivated self-disciplined normalI am a highly enterprising and energetic graduate, able to keep a(n) 1)___ attitude under pressure. My successful experience in the monthly training in 2012, when still attending 2)___ classes, proved me a person with 3)___ abilities to multitask. As a(n) 4)___ person, I am the only one in the class who has never been late during the four-year learning at university.
Match the topic sentences with the corresponding supportive facts in the body paragraphs.