为什么tpo19阅读的section2少一道题,23题,有人知道是什么题吗
问题描述：
为什么tpo19阅读的section2少一道题,23题,有人知道是什么题吗
答
你下载的不完整吧亲.我上网找了很多，都是差这么一道题，你有么9. According to paragraph 4, scientists use foraminifera shells to learn about Pleistocene ocean conditions by O measuring the amount of calcium carbonate present in the shellsO determining the proportion of shell in each layer of sedimentO comparing shells deposited during the Pleistocene with those buried earlierO calculating the relative quantity of two oxygen isotopes in the calcite