在我国，会计档案定期保管的，其保管期限最长的是()。 A．1年 B．3年 C．5年

对于文章《盲孩子和他的影子》的解读不恰当的一项是[ ]

A．这是一篇美丽的童话，它营造了一种纯真、友好的氛围，又富有诗情画意。

B．开头着力渲染盲孩子的寂寞、孤独，突出了“盲”的不幸。这与后来见到光明、见到美好的外界景物时的喜悦、欢乐形成对比，赞颂了“爱”的崇高与珍贵。

C．在盲孩子获得光明的同时，“影子”也获得了生命，变成了一个美丽的孩子，这说明，给别人带来幸福，自己也能得到幸福。

D．作者让“影子”跟盲孩子讲话、牵手，最后还变成了一个有生命的美丽的孩子，这些想象毫无事实根据，是为了达到教育小孩子的目的而编造的。

  Just five minutes of exercise a day outdoors can improve mental health, according to a study.

Researchers from the University of Essex, UK have found that as little as five minutes of a “green activity” such as walking, gardening, cycling or farming could help to improve mood and increase self-esteem (自信).

Many studies have shown that outdoor exercise can reduce the risk of mental illness and improve a sense of well-being, but the new study, led by Jules Pretty and Jo Barton, was the first to determine how much time needed to be spent on green exercise for the benefits to show.

Barton and Pretty looked at data from 1,252 people of different ages, genders (性别) and mental health status (情况) taken from 10 studies in Britain.

They analyzed their different outdoor activities including walking, gardening, cycling, fishing, boating, horse-riding and farming in locations such as a park, garden or nature trail (路径).

They found that the mental health changes were seen after just five minutes. With longer periods of time exercising in a green environment, the positive effects were more apparent.

Looking at men and women of different ages, the researchers found the health changes were particularly strong in the young and the mentally ill.

Green and blue

A bigger effect was seen with exercise in an area that also contained water – such as a lake or river.

“This is because historically we are drawn to water to survive and it is in our genetic (遗传的) make-up to be at one with nature,” the researchers wrote in their report.

Pretty said those who were generally inactive, or stressed, or with mental illness would probably benefit the most from “green exercise”.

“Employers, for example, could encourage staff in stressful workplaces to take a short walk at lunchtime in the nearest park to improve mental health.”

He also said exercise programs outdoors could benefit youth offenders.

小题1:How is the study this article refers to different from other studies?

A．It involved more people.

B．It took longer to finish the research.

C．It determined the exact amount of time needed.

D．It was led by just two researchers.小题2: What can we conclude from the findings of the study?

A．Just five minutes of “green exercise” daily can help improve mental health.

B．Gardeners and farmers do not need “green exercise”.

C．Walking in a park with a lake will weaken the effect.

D．“Green exercise” is not suitable for the mentally ill.小题3:. According to Pretty, _______ would probably benefit the most from “green exercise”.

A．stressed, inactive people

B．office workers

C．youth offenders

D．women and children小题4: What is the main problem discussed in this article?

A．Physical well-being.

B．Outdoor exercise.

C．Mental illness.

D．Harmony with nature.

在胶囊材料中，二氧化钛可作

A．成型材料
B．增塑剂
C．遮光剂
D．防腐剂
E．增稠剂

酯化反应生成的主要气相产物是（）。

A、乙二醇

B、水

C、二甘醇

D、低聚物