【简答题】Listen to the recording and fill in the blanks with the words you hear. In the past, Brazilian family sizes were much ____1____ than today. In the 1990s, family size suddenly ____2____. What is ____3_...
【简答题】判断下列句中划线部分数字的书写形式是否正确,若正确请填写T,若错误请填写正确写法。 1. This distance is about five trillion eight hundred sy-eight billion miles. 2. A light-year is a unit of length equal to the distance that light travel...
【简答题】判断下列句中划线部分数字的书写形式是否正确,若正确请填写T,若错误请填写正确写法。 1. This distance is about five trillion eight hundred sy-eight billion miles. 2. A light-year is a unit of length equal to the distance that light travel...