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2.气相色谱法按色谱原理不同可以分为（）
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4.气相色谱法具有诸多优势，不恰当的说法是（）
气相色谱法中，可用于衡量柱效的参数是（）
Task 1 Read the passage. Write T (true) or F (false) for the statements.Black Friday is the Friday following Thanksgiving in the US. On this day, the Christmas shopping season begins and large stores all over the US have sales. Recently, Black Friday has been the busiest shopping day of the year in the US.The name “Black Friday” originated in Philadelphia where it was used to describe the heavy traffic in the city after Thanksgiving. Later, another explanation of the name was made. When a company loses money, we say it is “in the red” and when it makes money, it is “in the black”. So “Black Friday“has come”to symbolize the day when companies can start to make a big profit.Black Friday has caused some problems. In 2008, a crowd of 2000 shoppers were waiting outside a local Wal-Mart in New York. When the store opened, everyone rushed in and one person was killed in the crush. Due to incidents like this one, many people now do their Black Friday shopping online.. It is common for people to wait until Monday to do this because they can buy things online that do not sell over the weekend. This has led to a new name for the Monday after Thanksgiving-Cyber Monday.1.Black Friday is the Friday before Christmas.2.It is currently the busiest shopping day of the year in the US.3.The name “Black Friday” came from a song.4.Black Friday can be dangerous.5.Cyber Monday is the day when the computer shops all have big sales.
Task 2 Read the passage. Choose the best answer.Competition time!As Thanksgiving gets nearer, would you like to win a cupboard full of food and drink? Enter our competition and you’ll have the chance to do a ten-minute trolley dash. That’s right, one lucky winner will get exactly ten minutes to fill the trolley with anything you like-fresh fruit and vegetables, tinned and frozen food, cakes, biscuits, juice and crisps… anything on our shelves you can have it!Here’s all you have to do to win this amazing prize. In no more than one hundred words, tell us why we’re your favorite supermarket. Send your entry by email to foodparadise@marketworld.com.Make sure to include your address and your telephone number too.As well as our amazing first prize, we have lots of other prizes to give away, from boxes of chocolates to bouquets of flowers! All entries must be submitted by midnight on October 15th.1.What type of passage is this?A.An advertisement for a job.B.An advertisement for a competition.C.An advertisement for a college club.D.An advertisement for a new restaurant.2.What will the winner receive as a prize?A.Clothes.B.Food and drink.C.Vouchers.D.Flowers and chocolates.3.What do you need to do if you want to enter the competition?A.Write about why you like the supermarket.B.Write some suggestions about how the supermarket could be better.C.Answer some simple questions.D.Complete a word puzzle.4.How long should your entry be ?A.Between 100 and 200 words.B.Between 200 and 300 words.C.A maximum of 100 words.D.A maximum of 200 words.5.How should you send your competition entry?A.By postB. By faxC. By emailD. By text.
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