第20题: [单项选择]Questions 19 to 22 are based on the conversation you have just heard. A. Because he is too young to catch that. B. Because he has not been exposed to that. C. Because his sister hasn’t caught that. D. Because he has been immunized recently. 参考答案:D 答案解析:[听力原文] Why does the doctor think that it is unlikely for the child to catch the whooping cough
第25题: [单项选择]以下各项中,除()之外,均是房屋建筑工程施工总承包三级企业可以承担的。 A. 高度70m及以下的构筑物 B. 建筑面积1.2万m2及以下的住宅小区 C. 单跨跨度24m及以下的房屋建筑工程 D. 建筑面积2万m2的住宅小区 参考答案:D 答案解析:房屋建筑工程施工总承包三级企业可以承包工程范围如下:
1)单跨跨度24m及以下的房屋建筑工程。
2)高度70m及以下的构筑物。
3)建筑面积1.2万m及以下的单体工业、民用建筑工程。