LiMingskatesbackwards .[ ] A. snowly B. 发布时间:2017-04-19 18:14 │ 来源:www.tikuol.com 题型:选择题 问题: Li Ming skates backwards .[ ]A. snowly B. slow C. quick D. slowly
题型:选择题 What is an e–reader? An e–reader is a small computer. It can hold thousands of e–books. So people want to throw away heavy schoolbags and read with small, light e–readers. For example, a US high school has put its paper books away. Teachers and students are using e–readers now. “It’s so convenient. You can have so many books right at your fingertips.” said Meghan Chenausky,16. Chinese schoolchildren are also trying e–readers. Hanvon WISEreader is the most popular e–reader in China. It weighs about 260g and is as big as a regular textbook. It is a special e–reader. Students can make notes on it. They can use it to download textbooks from school computers. It can also send and receive homework. New e–readers are not just for reading. They have WI-FI(无线网络) and multimedia(多媒体).Parents think these may hurt children’s study habits. “I think WI-FI is not necessary for kids.” says Zeng Wenwen,43, Beijing. 根据短文内容,判断下列句了正误。正确为“T”,错误为“F”。并在答题卡上把“T”或“F”涂黑。小题1:An e–reader can keep thousands of e–books.小题2:An e–reader can help to make schoolbags lighter than before.小题3:In every US school, e–readers are used instead of paper textbooks.小题4:The passage mainly introduces the size of an e–reader.小题5:A different opinion is against the WI-FI and multimedia of e–readers. 查看答案
题型:选择题 (8分)(1)小明从超市购买了一些食品,发现生产厂家为了延长保质期进行了不同的处理:①采用真空包装,其目的是 ;②采用充气包装,其中的气体可能是 ;③放置一包生石灰,其作用是(用化学方程式表示) ;④放置一包“双吸剂”--还原性铁粉,它吸收的两种物质是 。(2)现有H、C、O、Na四种常见的元素,请选用其中的元素写出符合下列要求的物质各一种(用化学式表示):①食品中常用的甜味剂 ;②厨房中的酸性调味剂 ;③用于配制炉具清洁剂的碱 ;④治疗胃酸过多的一种盐 。 查看答案