题目

下列四个生活、生产现象： ①用两个钉子就可以把木条固定在墙上；②植树时，只要定出两棵树的位置，就能确定同一行树所在的直线；③从 A地到 B地架设电线，总是尽可能沿着线段 AB架设； ④把弯曲的公路改直，就能缩短路程 .其中可用基本事实 “两点之间，线段最短 ”来解释的现象有 (     ) A． ①② B． ①③ C． ②④ D． ③④It was Monday. Mrs. Smith’s dog was hungry，but there was not any meat in the house. Thinking that there was no1way, Mrs. Smith took a piece of paper, and wrote the following words2it:“Give my dog half a pound of meat.”Then she gave the paper to her dog and said, “3this to the butcher, and he’s going to give you your lunch today.”4the piece of paper in its mouth, the dog ran to the butcher’s shop. It gave the paper to the butcher. The butcher read it5, recognized that it was6the lady’s handwriting and soon did7he was asked to. The dog was very happy, and ate the meat up at once. At midday, the dog came to the shop again. It gave the butcher a piece of paper again. After reading it, he gave half a pound of meat8. The next day, the dog came again just at midday. And as usual, it brought a piece of paper in the mouth. This time, the butcher did not take a look at the paper, and gave the dog9meat, for he had regarded the dog as one of his customer. But, the dog came again at four o’clock. And the same thing happened once again. To the butcher’s surprise, it came for the third time at six o’clock. The butcher10puzzled. He said to himself, “This is a small dog. Why does Mrs. Smith give it so much meat to eat today? ”Looking at the piece of paper, he found that there were not any words there. 1.A.the othersB.otherC.othersD.the other2.A.underB.inC.onD.above3.A.TakeB.BringC.GetD.Carry4.A.EatingB.DrinkingC.DroppingD.Holding5.A.carefullyB.quietlyC.slowlyD.clearly6.A.possiblyB.reallyC.hardlyD.strongly7.A.whenB.sinceC.asD.after8.A.tooB.alsoC.againD.either9.A.itsB.hisC.himselfD.it10.A.feltB.turnedC.stayedD.kept