第3题: [单项选择]Questions 15-18A. To study the problems of local industries. B. To find ways to treat human wastes. C. To investigate the annual catch of fish in the Biramichi River. D. To conduct a study on fishing in the Biramichi River. 参考答案:D 答案解析:[解析] 15-18 There are some serious problems in the Biramichi River. The local chamber of comme
第17题: [单项选择]采用开放式、半开放式高温作业,利用自然通风,应尽量( )对热源隔离。 A. 在夏季主导风向的上风侧 B. 在夏季主导风向的下风侧 C. 在冬季主导风向的上风侧 D. 在冬季主导风向的下风侧 参考答案:B 答案解析:采用开放或半开放式作业,利用自然通风,尽量在夏季主导风向下风侧对热源隔离等。