阅读下面短文，从下面每小题的A、B、C、D四个选项中选出最佳选项，并在答题卡将相应的字母编号涂黑。    

    Students at a primary school in Fuzhou, Hast China's Fujian Province were required to clean the school toilets to help them develop good habits. But some parents are strongly against the idea. They can't see the advantages of students doing such chores （杂亊）. They think that the school should provide students with a proper education, not the chance to be school cleaners.

    In fact, parents, schools and society play an equally （同等地）important role in developing the character of students. It is good for schools to give students such tasks, because few of the students will do them at home. Their parents want them to do homework only.

    In recent years, some parents will make mountains out of molehills when students are asked to do some chores in schools. Some complain about the teachers if their kids get hurt in schools; some even challenge the schools' teaching methods and management. As a result, many primary schools, especially those in big cities, do not let students join in outdoor activities during breaks, fearing that they might get hurt. This is bad for the development of students' best qualities.

    What the primary school in Fuzhou is doing is worth praising. Doing chores can put a sense of responsibility into students' minds and teach them the spirit of rules as well as teamwork. Also, it can make students' in﹣school experiences more meaningful.

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阅读资料，回答下列问题。

2013年12月25日俄罗斯“绍卡利斯基院士”号旅游考察船在南极遇险，中国第30次南极科考船“雪龙”号接到求救信号后，立即改变航线，全速航行，前往营救。终于在1月2日成功营救了俄罗斯52名被困南极乘客。52名乘客被困在南极厚厚的浮冰中已有一周多时间，其中包括各国科学家、记者和游客。

人的皮肤细胞分裂后，新生成的细胞中染色体数目与原来的细胞比（  ）

    Tu Youyou is a Chinese pharmaceutical chemist(药学家) and educator. She is best known for discovering artemisinin(青蒿素) which ____(use) to treat malaria(疟疾) and has saved ____(million) of lives. She won the Nobel Prize in Medicine in October 2015. She is the ____(one) Chinese woman to win this prize.

    Tu was born in Ningbo, Zhejiang Province, China ____ December 30^th, 1930. From 1951 to 1955, she attended Peking University Medical School. Later, Tu was trained for two and a half ____(year) in traditional Chinese medicine. Now she is the Chief Scientist in the Academy(研究院) of Chinese Medicine in Beijing.

    Tu has some health problems as a result of working poor conditions for ____long time. But she is still doing research. When Tu finally received Nobel Prize for her achievements, she said the success ____(belong) to her team, which did research in those poor conditions. And she thinks artemisinin is a gift from China and from ____(tradition) Chinese medicine to the world, to the millions and millions of people,____ (especial) poor children, all over the world who have malaria.

    Tu Youyou is already 87 years old,____she says she won't stop studying or working.