【简答题】阅读理解。 Unlike modern animal scientists, dinosam scientists cannot sit on a hillside and use telescopes to watch dinosaurs in order to know how they lived and whether they were good parents Instead, the...
【简答题】Fill in the blanks with words that are often confused. 1. primitive, primary A. _________man made himself tools from sharp stones and animal bones. B. People had no letters at the____________ stage of...