汽车由静止开始在平直的公路上行驶，0~60s内汽车的加速度随时间变化的图像如图2 发布时间：2017-07-23 06:21 │ 来源：www.tikuol.com 题型：选择题 问题： 汽车由静止开始在平直的公路上行驶，0~60s内汽车的加速度随时间变化的图像如图2所示。则该汽车在0~60s内的速度－时间图像（即v-t图像）为图3中的（ ）
题型：选择题 完形填空。 Rudi Matt lived in a small village in the Swiss Alps in 1865. What he wanted most in the world was to climb the 1 peak (山峰) in the Alps. Rudi's mother and his uncle, Franz, a mountain guide, wanted him to stop 2 and start working in a hotel. Rudi would not 3 his dream and secretly got in touch with an English mountain climber 4 was planning to climb the highest peak. Franz was very 5 when he found out what Rudi had done, but he finally agreed to let Rudi go if he went climbing, 6 . Franz also didn't want to see Emil Saxo, a guide from another village, got to the top 7 him. Rudi turned out to be a very good climber, 8 as they got close to the top, the Englishman got sick and could go no farther. Franz 9 behind to take care of him, but Saxo continued, wishing to be the 10 to the top. Rudi went after Saxo, hoping to 11 him to the top. When they met, Saxo fought with Rudi and fell down by accident. Saxo was helpless and hurt. Rudi must 12 whether to carry Saxo back down to safety or to continue alone to the top. He decided Saxo's life was more 13 than his dream and helped him down. During that time, the Englishman and Franz 14 the climb, and finally they reached the top. Later, when they returned to the village, they told people that 15 was the real conqueror (征服者) of the mountain. ( )1. A. highest ( )2. A. learning ( )3. A. try out ( )4. A. what ( )5. A. tired ( )6. A. again ( )7. A. after ( )8. A. but ( )9. A. walked ( )10. A. first ( )11. A. take ( )12. A. wonder ( )13. A. important ( )14. A. stopped ( )15. A. Franz B. farthest B. playing B. give up B. which B. glad B. too B. behind B. so B. rested B. second B. beat B. remember B. successful B. continued B. Saxo C. biggest C. climbing C. go over C. whom C. quiet C. once C. before C. or C. stayed C. third C. push C. ask C. popular C. enjoyed C. the EnglishmanD. deepest D. talking D. work out D. who D. angry D. instead D. over D. for D. watched D. last D. help D. decide D. interesting D. finished D. Rudi 查看答案
题型：选择题 当悬置的主弹簧（橡胶部分）出现裂缝时，如何判断零件是否失效？（）A.裂缝长度大于25深度大于5B.裂缝长度小于25深度小于5C.裂缝长度大于15深度大于8D.裂缝长度小于15深度小于8 查看答案
