题目

已知数列＝          。 答案： .  阅读理解 　　One day, an expert in time management was speaking to a group of business students, he used an illustration that those students will never forget． 　　As he stood in front of the group he said, “Okay, time for a quiz．” Then he pulled out a one-gallon, wide–mouthed jar and set it on the table in front of him． 　　He then produced about a dozen fist-sized rocks and carefully placed them, one at a time, into the jar．When the jar was filled to the top and no more rocks would fit inside, he asked, "Is the jar full?" 　　Everyone in the class said, "Yes．" 　　He replied, "Really?" 　　He reached under the table and pulled out a bucket of gravel, then dumped some gravel in and shook the jar causing pieces of gravel to work themselves down into the space between the big rocks． 　　He asked the group once more, "Is the jar full?" 　　By this time the class was on to him．"Probably not," one of them answered． 　　"Good!" he replied． 　　He reached under the table and brought out a bucket of sand．He started dumping the sand in the jar and it went into all the spaces left between the rocks and the gravel．Once more he asked the question, "Is the jar full?" 　　"No!" the class shouted． 　　Once again he said, "Good!" 　　Then he grabbed a pitcher of water and began to pour it in until the jar was filled to the brim．Then he looked at the class and asked, "What is the point of this illustration?" 　　One eager student raised her hand and said, "The point is, no matter how full your schedule is, if you try really hard you can always fit some more things in!" 　　"Good answer, but no," the speaker replied, "that's not my point．The truth this illustration teaches us is：If you don't put the big rocks in first, you'll never get them in at all． (1) The expert ________． [　　] A． was speaking to the university students B． enjoyed giving students a quiz C． was used to making experiments D． was especially good at managing time (2) The expert used the jar ________． [　　] A． to contain the rocks B． to contain the gravel C． to make an experiment D． to illustrate his ideas (3) ”the class was on to him” menas ________． [　　] A． the class went on his lesson B． the class began to understand him C． the class was confused D． the class was controlled by him (4) We can infer from the passage that ________． [　　] A． No mater how full your schedule is, you can always fit some more things in B． In life you should put your big rocks in first or you'll never ge them in at all C． Putting the big rocks in first can make the jar contain most D． We should consider the important things first in our life