Good morning, everyone! Welcome to Cool Food Store. Christmas Day is next Sunday. Our 1is on sale for Christmas.2and have a look. We have hamburgers3 only 7 dollars. Do you like snacks（零食）? We 4 all kinds（种类）of snacks. You can also buy vegetables at our store—potatoes, 5 They are all 6. Our drinks（饮料）are all at good 7 Juice is 2 dollars. Coke is 3 dollars. How much is our milk? Oh, it's only 1 dollar. Do you need fruit? Come to our store. We have many fruits, like（例如）oranges, pears and strawberries. Our store is open（营业的）8 9:00 am to 9:00 pm every day. 9 want it, we have it. Come to our store to buy some of your favorite food. Then you can have a10dinner with your family on Christmas Day.

1930年，一位环球旅行的美国人在中国、苏联和英国分别看到的景象是（    ）

人体将代谢废物排出体外有不同的途径：一部分水和少量无机盐，尿素等以汗液的形式通过皮肤的____ 排出；二氧化碳和少量水分以气体的形式由____ 排出；绝大部分水、无机盐以及对人体有害的尿素等废物通过____ 随尿液排出．

下列食物链正确的是（　　）