题目

The study, in the online edition of the journal Brain, showed that after one year of musical training, children performed better in a memory test than who did not take music classes. A . published; those B . publishing; these C . to be published; ones D . being published; the ones 答案：A11．已知△ABC，利用三角板画平行线．（1）过A点画BC的平行线；（2）取BC得中点D，再过点D画AB的平行线交AC于E；（3）过点D画AC的平行线交AB于点F．