【单选题】听力原文:W: Leonard, can I use your library card to borrow a book? I forgot to bring mine. M: I would be glad to be of help. But I am afraid that mine wouldn't be of any use to you anyway. They allow only...
A.
He will not lend his card to anybody.
B.
The woman cannot borrow books with his card right now.
C.
Using another person's card is against the rules of the library.
D.
His library card is no longer valid.
【单选题】能够对甲胺、二甲胺、三甲胺进行分离提纯的方法是()
【判断题】高分子物质一般是指平均分子量大于1000的物质。
【简答题】请将本章节的学习内容以思维导图的方式进行归纳总结,需要详细的,字数300字以上,有电脑的同学使用电脑制作(推荐软件xmind7,手机也可以安装此软件),没有电脑的同学可以采用手绘。答案以图片的方式上传至答题区域,不得出现雷同,若发现雷同,雷同的作业均以0分计入平时作业。
【简答题】看图,选择合适的句子组成对话,把序号写在横线上。 A. Where is my ruler? B. Can I use your ruler? C. How many pencils do you have? D. Where is my book? E. It's under the desk. F. It's under the chair? 1. ____________ 2. ______...