The main idea of this passage is

题库:综合类 类型:最佳选择题 时间:2017-07-03 03:15:27 免费下载:《单选题》Word试卷

The main idea of this passage is
A.different weight systems in different places.
B.freedom from traditional ideas.
C.traveling from the earth to the moon.
D.the effect of gravitation on weight.

本题关键词:肛I,石I鱼,因子I,I因子,I导联,I度烧伤,I类抗原,I期愈合,I类分子,I类环境;