A dense wave of smog began in the Chinese city of Harbin and the surrounding Heilongjiang, Jilin, and Liaoning Provinces on 20 October 2013. Unseasonably warm temperatures with very little wind across northeastern China coincided with the smoke from local farmers' burning straws and the start-up of Harbin's coal-powered central heating system. Record densities of fine particulates were measured in the city. In Harbin, the levels of PM2.5 (particulate matter) rise to 1,000 micrograms per cubic meter, worse than Beijing's historic highs. Visibility was reduced to below 50m in parts of Harbin, and below 500m in most of the neighbouring Jilin Province. On Fa Yuen Street in Harbin, visibility of less than 5m was reported. The smog reduced after October 23, 2013 and completely broke up on October 28, 2013 by the first local snow and icy rain due to a cold front moving in from Russia. Harbin lies in the north of China where winter temperatures can drop to -40degC, demanding a six-month heating season. Daily particulate levels of more than 40 times the World Health Organization recommended maximum level were reported in parts of Harbin. The smog remained till 23 October, when almost all monitoring stations in Heilongjiang, Jilin,and Liaoning Provincesreported readings above 200mg/m3forPM2.5. PM2.5 is the amount of particulate matter less than 2.5 micrometers in diameter in the air, with the WHO recommending a maximum 24-hour mean of 25 micrograms per cubic meter (mg/m3). On the morning of 25 October, PM2.5 measurements in Harbin had fallen to an average of 123mg/m3. All highways in the surrounding Heilongjiang Province were closed. In Harbin, all primary and middle schools were closed for three days and authorities stopped flights at the airports. Hospitals reported a 23 percent increase in admissions for breathing problems. However, this smog will have no influence on Harbin Ice Festival events later in December 2013. Air pollution in Chinese cities is of increasing concern to China's leadership. Particulates in... One cause of the heavy smog in the northeastern Chinese cities may be _ . A) the lasting cold weather B) farmers' burning of forests C) too much strong wind D) the start-up of heating system
D
An American woman Anna Jarvis was the first person to decide the mothers should have a holiday in their honor each year. Miss Jarvis started her campaign in 1906 in her home city Philadelphia. She wrote thousands of letters to congressmen , city officials, teachers and newspaper publishers, proposing an official holiday for mothers. She traveled all over America, trying to get support for the idea. Her battle went on for years. In 1914, the Congress declared the second Sunday in May each year as Mother's Day. Anna Jarvis wanted Mother's Day to be a simple event. She thought children could honor their mothers by spending some time with them as an act of love and respect. However, the holiday turned out to be a major event for department stores, flower shops and greetingcard industry, which Miss Jarvis didn't like. Americans spend millions of dollars on gifts for their mothers on this day. Younger children often try to prepare and serve breakfast for their mothers. Fathers may offer to take care of children so that mothers can enjoy themselves. The holiday becomes an important time for family gathering. On Mother's Day _ . A) all women, young and old, receive gifts B) families gather together C) all people stay at home D) no one goes to work
B
Q: The Entropia Universe The Entropia Universe is a virtual world on the Internet, which seems very like our real life.It is set in a distant future and based on a planet called Calypso.Entropia was the brainchild of a group of Swedish computer lovers who decided to see if they could create a three dimensional virtual world that could be placed on the Internet.They did manage after they received the financial backing they needed. The game can be played for free, but nearly all in-game activities require personal resources that you have available to use.Although there are various activities to keep you busy on Calypso, what most people do first is to find themselves a profession, such as hunting the fierce animals on Calypso, mining the precious minerals and making tools.Then they can think about buying their virtual house or paying a visit to a virtual nightclub or doing any of the other activities that make life bearable. Entropia has its very own economy and its own currency, the PED (Project Entropia Dollars).Players move real world money into PED which they then use to pay for their life on Calypso.However, the virtual things inside Entropia do have a real value in the outside world, and careful business deals mean that players can actually make real money there.PED can be changed into dollars any time at a rate of 10PED to 1US$. What's so impressive about The Entropia Universe is the number of players; currently more than 600,000 representing over 220 countries from planet Earth.A number of players insist that it's a good way to make money.However, the reality of Entropia's economic system is that most people end up paying more than they earn and it's not uncommon to find players who are paying up to $200 a month into their PED account.This might not be the most economical way of spending one's free time.However, some people say that for them the fact that they can escape the realities of the earthbound life and become a different person with a completely different life for a few hours every week is... According to the author, playing on The Entropia Universe _ . A) may be very annoying B) can be quite expensive C) is a cheap way to kill time D) is a good way to earn money
A: B
(Q).
When I was a kid, I was close to my dad, but as I grew older, my dad and I grew further apart. We always had totally different opinions. He thought that college was a waste of time, but for me it was important to finish college. He wanted me to work my way to the top as he had done in his field, but I wanted a different life. There was a time when we did not talk with each other. A few months ago, I heard that my 84-year-old dad was in poor health. When he called and asked whether I could move from Colorado back to Tennessee to help him, I knew he was seriously ill. I am his only child and so it was time to meet my father's requirement. Two weeks after moving back, we bought a boat and started fishing again. Fishing was one of the few things that we did while I was young and that we both enjoyed. It is strange but true that as we are fishing we are able to put things that have kept us apart for so many years behind us. We are able to talk about things that we have never talked about before. Fishing has been healing the old wounds that have kept us apart It is not important how many fish we catch. It is about enjoying the relationship that we have not had for years. I'm 62 and he is 84. When we are on the lake fishing, it is like two kids enjoying life. It is far better to find a way to put the unhappy past behind. I am so lucky to spend the happy time with my father in his last years. Now my heart is filled with love. A smile always graces my lips. The author and his father became further apart because _ . A) they had different views on things B) they lived very far from each other C) they only communicated by phone D) they seldom went to see each other
(A).
A