题型:阅读理解 题类:模拟题 难易度:普通
黑龙江省齐齐哈尔市2018届高三英语第三次模拟考试试卷
Durian(榴莲) is probably the smelliest fruit in the world, letting out an unusual unpleasant smell which would make anyone bring up. However, nobody was aware of what gave this fruit its unique smell, so a team of researchers from Singapore decided to take a look at its genome (基因组) and find out,
Durian is well-known throughout Southeast Asia as the king of fruits, mostly because of its awful appearance and smell. However, the origin of this unpleasant smell was unknown, so researchers decided to map the genome of the fruit, and find the gene that controlled it. A group of genes, volatile sulfur compounds (含硫化合物), became very active in the fruit, and they were found responsible for resulting in the unpleasant smell.
The fruit confuses everyone with a sulfuric smell, like rotten onions and ingredients. The smell lasts long, mostly because the fruit contains more volatile sulfur compounds. Other species usually benefit from two gene copies at most, but durian has four, leading to the striking smell.
However, this smell might be an advantage for durian in the wild. Although we find it unpleasant, many animals might be attracted by it. If they eat the fruit, then they can easily spread its seeds everywhere, thus contributing to the distribution of the species.
The mapping of the durian genome also showed some other information on the species. First of all, the fruit has an impressive number of genes, namely 46,000. Also, with the help of these genes, they saw how it evolved, and discovered it was related to the cacao tree. All the other discoveries have been published in the journal Nature Genetics.
Despite the striking smell, many people actually enjoy eating the fruit. However, not all durian species are edible, and some of them may even cause damage to our health, Even so, the fruit is often imported, significantly contributing to the economy.
Basic Table Manners Take a moment to study some table manners before all of the company dinners and formal dinners with your relatives. Even if you've heard these rules before, a quick refresher course will help you feel confident and in control before eating with your boss or aunt. Here's how to mind your manners at the dinner table: |
First things first: Mind the little details--you've heard them all before. Respond to invitations in a timely I manner; remember that it's always better to be overdressed; be fashionably on time; bring a gift for your host or hostess; and remember to silence your phone and keep it out of sight. |
After you sit down: The first thing you should do is place your napkin in your lap. Leave it there until the end of the meal, or until you excuse yourself from the table. There's some debate about what to do with your napkin when you get up, but the most common practice is to place it on your seat until you return. If you're worried that your napkin has food on it that could stain the scat or your clothes when you sit back down, place it to the left of your plate instead. |
Bread plate and drink: When in doubt, look to your hands. With your palms(手掌)facing each other, connect the tip of each forefinger with your thumb. You'll see that your left hand will form a "b", and your right hand, a "d". These stand for "bread" and "drink, "which you will find to your left and to your right, respectively. |
What to do with the utensils(餐具): Your safest bet is to start from the outside-the utensils farthest from your plate-and move inward as the meal progresses. However,dessert utensils may also be found above your plate. |
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