题目

下列关于蛋白质的作用正确的是（ ） ①催化 ②调节 ③运输物质 ④储存遗传信息 ⑤免疫 ⑥主要的能源物质 ⑦构成生物体和细胞A.②③④⑤⑥ B.①②③⑤⑦C.①②③⑥⑦ D.②③⑤⑥⑦ 答案：【答案】B【解析】1、蛋白质功能具有多样性：许多蛋白质是构成细胞和生物体结构的重要物质（如肌肉、羽毛）；催化功能（如酶）；运输作用（如血红蛋白）；免疫功能（如抗体）；传递信息，调节生命活动（如胰岛素）；总之，一切生命活动都离不开蛋白质，蛋白质是生命活动的主要承担者；2、根据短文内容回答问题。Do you think that French fries are really French? French fries are called "pommes frites" in France and they are not from France. French fries come from Belgium(比利时) originally. French fries are made of potatoes, and they are cut and fried. The fried potatoes are called French fries because they were first seen by Americans in Belgium, but they were fried in the French way. The French way is to fry potatoes twice with a small pause in the middle.During World War I, there were a lot of hungry American soldiers in Northern France and Belgium. They ate French fries in Belgium. After the war was over, the soldiers(士兵) went back home to America. However, they missed French fries so much that they made French fries at home. That's how French fries were fist introduced to America.French fries were called Belgian fries once, but the name was finally changed to French fries. Sometimes French fries are just called fries.French fries are one of the most popular potato foods in America. American fast food restaurants such as McDonald's and Burger King have French fries on their menus. French fries are freshly fried, and usually served with hamburgers.If you visit any fast food restaurant in America and order a hamburger, you will probably hear "You want fries with that?" Why don't you think about the history of French fries a little while, and say "Yes, please. Thank you."1.What are French fries made of?__________________________________________________2.Where do French fries come from?__________________________________________________3.Why are the fried potatoes called French fries?__________________________________________________4.Who first introduced French fries to America?__________________________________________________5.What does the underlined "that" in the last paragraph stand for?__________________________________________________