单选题
1分
In many installations basket strainers consist of a cylindrical container in which a perforated meta...
In many installations basket strainers consist of a cylindrical container in which a perforated metal or wire basket is suspended. The bold and italic word “which”means______.
参考答案: C
参考解析: 注:筒状滤器是由一个圆柱形容器组成,在该容器内悬挂了有孔的金属笼。