题目

如图K16－2所示，直线AB和CD是彼此平行且笔直的河岸，若河水不流动，小船船头垂直河岸由A点匀速驶向对岸，小船的运动轨迹为直线P.若河水以稳定的速度沿平行河岸方向流动，且整个河流中水的流速处处相等，现仍保持小船船头垂直河岸由A点匀加速驶向对岸，则小船实际运动的轨迹可能是图中的( ) A．直线P B．曲线Q C．曲线S                D．直线R     图K16－2  Long ago in a small town, there was a place known as the House of 1,000 Mirrors. A small, happy little dog learned of this place and decided to visit.When he arrived, he bounced(跳) happily up the stairs to the doorway of the house. He looked through the doorway with his ears lifted high and his tail wagging as fast as it could. To his great surprise, he found himself staring at 1,000 other happy little dogs with their tails wagging just as his. He smiled a great smile, and was answered with 1,000 great smiles just as warm and friendly. As he left the house, he thought to himself, “ This is a wonderful place. I will come back and visit often.” In this same village, another little dog, who was not quite as happy as the first one, decided to visit the house. He slowly climbed the stairs and hung his head low as he looked into the door. When he saw the 1,000 unfriendly looking dogs staring back at him, he growled at them and was horrified to see 1,000 little dogs growling back at him. As he left, he thought to himself, “This is a horrible place, and I will never go back there again.”All the faces in the world are mirrors. What kind of reflections do you see on the faces of the people you meet? 1.Why was the first dog surprised when he entered the house?A. Because he didn’t expect to see so many happy dogs.B. Because he didn’t know there were 1,000 mirrors in the house.C. Because he was always in a mixed mood. D. Because he saw so many dogs smiling at him.2.Why did the first dog like the house?A. Because there were 1,000 mirrors in the house.B. Because he thought he could keep himself warm in the house.C. Because he liked everything presented to him.D. Because he felt he was welcome here.3. The underlined word “ growled” probably means ______.A. make an unfriendly noise B. smile C. say hello D. stare4.Which of the following is the most suitable title for the passage?A. A Small Happy Little Dog B. The House of 1,000 MirrorsC. The Wonderful Place and the Horrible Place. D. Two Little Dogs