Read the following article and select the best answer. Article: Up to 90% of school leavers in major Asian cities are suffering from myopia ---short-sightedness, a study suggests. Researchers say the "extraordinary rise" in the problem is being caused by students working very hard in school and missing out on outdoor light. Eye experts say that you are short-sighted if your vision is blurred beyond 2m. It is often caused by an elongation of the eyeball that happens when people are young. According to the research, the problem is being caused by a combination of factors - a commitment to education and lack of outdoor light. Professor Morgan who led this study argues that many children in South East Asia spend long hours studying at school and doing their homework. This in itself puts pressure on the eyes, but exposure to between two and three hours of daylight helps maintain healthy eyes. Cultural factors also seem to play a part. Across many parts of South East Asia, children often have a lunchtime nap. According to Professor Morgan they are missing out on natural light to prevent short-sightedness. A big concern is the numbers of the students suffering from "high" myopia. One in five of these students could experience severe visual impairment and even blindness. These people are at considerable risk--sometimes people are not told about it and are just given more powerful glasses--they need to be warned about the risk and given some self-testing measures so they can get to an ophthalmologist and get some help. For decades, researchers believed there was a strong genetic component to the condition. But this study strongly suggests an alternative view. "Any type of simple genetic explanation just doesn't fit with that speed of change; gene pools just don't change in two generations. Whether it's a purely environmental effect or an environmental effect playing a sensitive genome, it really doesn't matter, the thing that's changed is not the gene pool---it's the environment." Question: As is mentioned above, which factor mainly results in students' myopia in South East Asia? - Genetic faults of the people. - Elongation of the eyeball. - The shortage of outdoor light. - Lack of research into the problem.
The shortage of outdoor light.

Read the following article and select the best answer. Article: Boys and girls,as we all know,most people,especially young people ,tend to care about their hair much because hair plays a very important role in our appearance.But can you imagine what other uses hair has?Do you have any idea that human hair may become a new solar energy soutce?Before we begin with the new content of our Physics ,let me tell you a new invention first. It's reported that a Nepali teenager has designed a $32 solar panel using human hair. Milan Karki,who is 18 years old and lives in a village in rural Nepal,used human hair to replace silicon ,which is a common but expensive componet of solar panels. By using hair as a replacement,Karki says that solar panels can be produced for around $32,a price that could be halved if they were mass-produced. The solar panel works,because melanin ,which gives hair its colour,is light sensitive and can act as an elecrtical conductor.Kaiki was inspired to think of the idea by a Stephen Hawking book ,which explained how to create elecrtic energy from hair. The device that Karki has invented is capable of producing 9V or 18V of energy--plenty to charge a mobile phone. "Half a kilo of hair can be bought for only 16p in Nepal and lasts a few months;whereas a pack of batteries would cost50p and lasts few nights,"according to The Daily Mail. The solar panel is claimed to be easy to service as the hair is easy to replace. Karki has now seng out several devices to other disrticts near his home for tetimg .He said,"First I wanted to provide elecricity for my home,then my village .Now I am thinking for the whole worle." So next time when you have a haircut,do remember to keep your hair cut down to use for energy.Perhaps you can also provide elecrticity for your home,even your village using your own hair. Question: Which of the following is true about the new invention? - We can buy solar panel for around $32 using hair as a replacement in the market. - The device can produce 9V or 18V of energy. - Karki thought of the idea of inventing the device all by himself. - Kaiki provides elecrticity for his home using hair.
The device can produce 9V or 18V of energy.

(Question)
Read the following article and select the best answer. Article: A friend asks me "Why don't Chinese go Dutch?" So I want to regard this question as the topic and write an article.As everyone knows,westerners will go Dutch while having a meal in the restaurant.But Chinese don't go Dutch.Chinese will pay the bill and check out generously.Westerners don't often entertain guests;but Chinese often invite friends to dinner.A lot of westerners feel puzzled to this question. Why does there exist such a difference? First of all,food systems between China and West are different.Chinese put into practice Gather Dining System;westerners put into practice Individual Dining System.Everybody can share the delicious food of all over the table when eating Chinese food.Please note it is sharing,but westerners just eat the food in one's own plate.If you eat beef and he eats chicken,it is impossible that you taste the flavor of his chicken.The result of the Individual Dining System is that you can only eat the food in your plate. So to eat Chinese food is happier than to eat Western-style food.And I want to ask you a question.Do you like the free thing? I think nobody doesn't like the free thing.Ok! Suppose I invite you to eat the delicious Chinese food,then I pay the bill.This is equivalent to that you have enjoyed a delicious Chinese food free.So you will be very glad.It will strengthen the relation between us in the happy atmosphere. Secondly,westerners eat for the health;Chinese eat for the friendship.Westerners advocate individualism and independence is strong.So westerners express that respect for each other's independence through the way go Dutch.Chinese like making friends and solidarity.Chinese value the interpersonal relationships and the friendship very much. Third,it is only simple "Have a meal!" for westerners to entertain guests.Unlike the purpose and the _ that Chinese entertain guests,in Americans' idea,"Have a meal" definition is to add fuel to the body for keeping health and normal life activity.That is to say,there is not any additional value.In the Chinese idea,"Have a... Question: What does "go Dutch" mean? - They will pay for the meal separately. - Either part will pay for the meal. - They will go to Dutch for a meal. - They can enjoy a meal free of charge.
(Answer)
They will pay for the meal separately.