NCM—4.0型内燃道岔打磨机长时间不用应该卸下汽油机，放净汽油，擦拭干净，遮盖好放在干净处。
参考答案：错
水电站正常工作的保证率以正常工作不破坏的相对（）或相对（）表示，前者为历时保证率，后者为年保证率。
In Pride and Prejudice, Jane Austen explored three kinds of motivations of marriage the middleclass people had in the second half of the 18th century. Try to make a brief discussion about them with specific examples from the novel. Make comments on Austen’s attitude towards these motivations.
