第5题: [单项选择]Passage One Questions 26 to 29 are based on the passage you have just heard. A. To make them longer. B. To avoid accidents. C. To save materials. D. To improve techniques. 参考答案:B 答案解析:[解析] 26-29 Why is there a space left between the rails of a railway line where one piece join
第18题:[单选题]The main difference between/e/and//lies in the__________． A.tongue position B.sound duration C.openness of the mouth D.shape of the lips 参考答案:A 考查元音的发音。根据发音时舌头在口腔中抬起的位置可分为：前元音、中元音、后元音。 根据发音时唇形的圆展可分为：圆唇元音和非圆唇元音。根据元音的长度可分为：长元音和短元音。根据以上分类方式，／e／可以描述为前、非圆唇、短元音，／／为中、非圆唇、短元音。由此可知／e／和／／的主要区别为发音时舌的位置。故选A。
