题目

如图所示,∠A=50°,∠B=20°,∠D=30°,则∠BCD的度数为（ ）A. 80° B. 100° C. 120° D. 140° 答案：【答案】B【解析】如图，延长BC交AD于点E，∵∠BCD=∠D+∠DEC，∠DEC=∠A+∠B，∴∠BCD=∠A+∠B+∠D，∵∠A=50°，∠B=20°，∠D=30°，∴∠BCD=50°+20°+30°=100°，故选B.One day, a rich father took his young son on a trip to the countryside. He wanted to show him how poor the villagers were and wished him to cherish what he had. They spent two days in a poor family in the village. On their return from the  trip ,the father asked his son, “How was the trip?” “ It was great, Dad.” “Did you see how poor people could be?” the father asked. “Oh, yeah!” said the son . “So what did you learn from the trip?” asked the father. After thinking for a while, the son answered, “I saw that we have a dog ,while they have four. We have a pool in the garden. And they have a small river without an end. At night, We have small lights in the garden, but they  have the stars in the sky. We buy our food, but they grow theirs. We have walls around to keep us safe but they have friends.”  You could imagine the look on the father’s face! Then the son went on, "Thanks, Dad. Now I know how poor we are!” 66. Did the rich father take his young son to the countryside?  　 ____________________________________________________________________________ 67.How long did they spend in the poor family in the village? _______________________________________________________________________________ 68. Where was the pool of the rich family? _______________________________________________________________________________