题目

海藻中含有丰富的碘元素。如图是实验室从海藻里提取碘的流程的一部分。下列判断正确的是( ) A． 步骤④的操作是过滤 B． 可用淀粉溶液检验步骤②的反应是否进行完全 C． 步骤①、③的操作分别是过滤、萃取 D． 步骤③中加入的有机溶剂可能是酒精或四氯化碳                                           With the development (发展) of China-Russia relations, more and more Chinese students begin to study Russian to prepare for studying in Russia. Also many people study it to work on China-Russia trade and tourism (旅游业).Tanya who comes from Russia is working in China. She teaches Russian at a high school in Jilin, China. During the past year, Tanya and her students have become good friends. To her surprise, she got many different gifts on Chinese Teachers’ Day. It was her first time to have such an interesting experience in the country.Tanya loves China. “There are many people who can speak Russian in China and they are kind to me. I like them and I feel happy to live here.” Tanya said. She also enjoys Chinese food and is interested in using mobile payment.As Tanya often puts pictures of her life on the Internet, her friends in Russia often ask her different kinds of questions about China. “For many Russians, China is a great country. So I often invite them to visit.” Tanya said. Tanya thinks of herself as a bridge to connect (连接) China and Russia. However, she thinks that she is “only a little bridge and more big bridges need to be set up”.1.Many Chinese students study Russian because ________.A.It’s interestingB.they want to travel in RussiaC.many Russian people come to ChinaD.It’s good for their future life2.How did Tanya feel about getting gifts on Teachers’ Day?A.Crazy. B.Surprised. C.Excited. D.Strange.3.What does Tanya often put online?A.Pictures of her life. B.Pictures of Chinese people.C.Pictures of different places. D.Pictures of Chinese food.4.What can we infer (推断) from the last sentence of the passage?A.Lots of Russian people will visit China.B.There will be a big bridge between China and Russia.C.Tanya does a lot for the development of China-Russia relations.D.China and Russia need to cooperate (合作) in many different areas.5.What's the best title for the passage?A.Travelling in Russia. B.A great country Russia.C.Russian girl in China. D.Relationship between China and Russia.