【单选题】What Is It? At the Center for Sickle-Cell Anemia in Benin City, Nigeria, Tope' s mother learned that sickle-cell anemia is a disorder of the blood. Contrary to superstitious beliefs, it has nothing to...
【简答题】Part one: T for true; F for false; or NG for not given. Many students find it hard to make themselves settle down and study, even when an important exam is around the corner.