听力
44.what type of trees were used to making masts?
答案是D,但俨然应该是C嘛
48.according to the talk, how does the Australia spiders attract the other kinds of spiders?
答案是B,不过读文章and attract the spider by tapping out different signals to mimic the struggles of a trapped insect and later keep changing the signals till successfully lured its prey out.我觉得应该能推出的是D~