题目

图为一列沿x轴正方向传播的简谐横波在t=0时的波形。当R点在t=0时的振动状态传到S点时，PR范围内(含P、R)有一些质点正在向y轴负方面运动，这些质点的x坐标取值范围是 A.2 cm≤x≤4 cm              B.2 cm<x<4 cm C.2cm≤x<3 cm                D.2cm<x≤3 cm 答案：CIt is well known that different countries have different customs. In each country, people ________ different kinds of clothes. Some clothes look very nice and_________. Some others look very strange.In Scotland (苏格兰), you ________ sometimes see men wearing kilts（方格呢短裙）. They look a little _____skirts. The materials of the kilt is not woolen（毛织品） _________ leather（皮革）. It is made of a kind of cloth. However, the Japanese women often wear _______________ traditional clothing called kimono（和服） on some special occasions. It is said that the kimono __________ ancient China. It is mainly influenced by the clothing of Chinese Tang times. __________ the young girls have some important activities, they usually wear the kimono. In Southern __________many young men in Brazil like wearing jeans with a bag on them. They often wear a hat on the head , too. We____________ them cowboys（牛仔）. The men look really cool while they are wearing their jeans.In a word , one kind of clothing stands for some culture and custom. What kind of clothes do you like to wear?【1】A. sell B. buy C. wear D. watch【2】A. ugly B. beautiful C. old D. new【3】A. can B. must C. need D. dare【4】A. as B. like C. with D. of【5】A. and B. but C. or D. till【6】A. our B. his C. their D. your【7】A. sent to B. came out C. came from D. arrived in【8】A. After B. Before C. Until D. When【9】A. China B. America C. Englan D. Japan【10】A. call B. tell C. say D. heat