The first group factor was the g factor of composition ability-the degree of the harmonious development of various abilities which interact one another in the cognitive activity of composition.
第二个是由词汇量、造句等能力组合成的词语能力，它是作文能力结构中的一个活跃因素。
Objective: to determine the amino acid composition and isoelectric point of porcine platelet-derived growth factor.
摘要目的：测定猪血小板衍生生长因子的氨基酸组成和等电点。
It is the main composition of moral emotions and conscience, the important medi-factor of prosocial and altruistic behavior.
它是道德情感和良心的主要组成部分，是亲社会行为和利他行为的重要中介因素。
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