题干

2015年诺贝尔生理学或医学奖获得者屠呦呦,早年从中医古籍里得到启发,通过对提取方法的改进,首先发现中药青蒿的提取物有高效抑制疟原虫的成分。这一发现在抗疟疾新药青蒿素的研发过程中起到关键性的作用。青蒿素的研发过程说明(   )。

①创新推动了社会生产力的发展

②辩证的否定是联系的环节,也是发展的环节

③充分发挥主观能动性是科学研究取得成功的前提

④应坚持开拓创新,在实践中检验真理和发展真理

A:①②

B:①③

C:②④

D:③④

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答案(点此获取答案解析)

C

同类题4

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

    Health is the most important thing in the world. Nothing is more important than health.If we take away our money,houses,or even our clothes,we can still survive.____ That is why we always try to eat in a healthy way and exercise regularly.

    How can we keep healthy?In order to eat healthily,I usually avoid eating food high in fat,like French fries or cookies,which are junk food.____ I eat a lot of vegetables and fresh fruit which are full of vitamins.

    ____ Taking exercise every day helps us build a strong body.Regular exercise is an important part of keeping me healthy.

    What's more,I think friends are an important part of one's health.____ I always feel better when I am with friends than I am alone.When I am with friends,I always laugh.Laughing is also an important part of health.It's good to stay with my friends.

    By eating properly and exercising regularly,I can keep my mind as well as my body happy.These things sound easy to do,but not many people can manage them.____

A.In addition,doing exercise is very important.

B.There are some people who like staying alone,but they keep healthy.

C.Many studies show that people with a wide range of social contacts don't get sick.

D.But if our health was taken away,it is certain that we would surely die.

E.I think a strong will is necessary if we want to keep healthy.

F.I only eat little meat.

G.Some people appear fat because they often eat too much.