Question of the Day. Can you answer today's question? 这就是SAT考试官网collegeboard的每日一题的训练。SAT考试不像托福、雅思或者GRE、GMAT考试，会有回忆机经，因此官网上的SAT真题就显得尤为重要。SAT考试官方每日一题可以让你熟悉SAT考试的出题方向及出题规律，有很大的参考价值，是每一位SAT考生都需要的备考资料。

　　楷维留学小编为大家整理The Official SAT Question of the Day——2013年12月27日-2013年12月28日SAT考试官方每日一题，希望对大家备考SAT考试有所帮助。

2013年12月27日SAT真题类型：Mathematics > Standard Multiple Choice 数学选择

　　Read the following SAT test question and then click on a button to select your answer.

　　The histogram above shows the distribution ofblack cherry trees, by height. For example, the leftmost bar represents the black cherry trees that are at leastfeet, but less thanfeet, in height. Based on the histogram, which of the following can be the average (arithmetic mean) height of theblack cherry trees?

　　(A)feet

　　(B)feet

　　(C)feet

　　(D)feet

　　(E)feet

2013年12月27日SAT考试官方每日一题答案：C

解析：The histogram does not give the recorded heights for each cherry tree, but rather the intervals in which the heights lie. Thus, to find possible values for the average (arithmetic mean) height, one can find lower and upper bounds for the average height by calculating the averages of lower and upper interval bounds of the histogram with the frequencies given. A lower bound for the average, found by using the value at the left endpoint of the interval, is feet, and so feet would be an upper bound for the average height. Therefore, the average height of the black cherry trees can be between feet and feet. Of the choices given, only feet can be a possible value for the average height of the black cherry trees.

2013年12月28日SAT真题类型：Critical Reading > Sentence Completions 完成句子

　　Choose the word or set of words that, when inserted in the sentence, best fits the meaning of the sentence as a whole.

　　Demographers and anthropologists have corrected the notion that European explorers in North America entered a ------- territory by showing that the land in some areas was already as densely ------- as parts of Europe.

　　(A) fertile . . settled

　　(B) colossal . . wooded

　　(C) desolate . . populated

　　(D) valuable . . exploited

　　(E) hostile . . concentrated

2013年12月28日SAT考试官方每日一题答案：C

解析：Only “desolate...populated” presents the contrast required by the sentence. The words “corrected the notion” signal that the first word in the correct answer must contrast with the second word because that second word corrects the mistaken notion.