【单选题】阅读下文,回答题 On November 19, 1863, Abraham Lincoln went to Gettysburg in Pennsylvania to speak at the National Soldiers Cemetery. The Civil War was still going on. There was much criticism of Presi-dent L...
【单选题】阅读下文,回答题 Trees are useful to man in three important ways: they provide him with wood and other prod-ucts; they give him shade; and they help to pr droughts and floods. Unfortunately, in many part...
【单选题】阅读下文,回答题 All the useful energy at the suce of the earth comes from the activity of the sun. The sun heats and feeds creatures and mankind. Each year it provides men with two hundred million tons of...