题目

如图a所示的结构由三根木档采用榫卯连接而成，其中木档1和木档2的结构如图b所示。 （1） 则木档3结构合理的是（ ） A . B . C . D . （2） 构件2的主视图正确的是（ ） A . B . C . D . 答案：D B听下面一段材料，回答第1至3题。 1. What did Peter ask Lucy to do? [     ]A. To play table tennis with himB. To help with his housework. C. To see the new house. 2. Why couldn't Lucy go with Peter? [     ]A. Because they were leaving the next morning. B. Because she had to help her mother pack things. C. Because she had to finish her homework.3. What happened while they were packing? [     ]A. Peter started reading a magazine while packing the magazine. B. They didn't work hard. C. Lucy's mother didn't need their help.