题干

小华步行,每分钟走80米,3分钟可以走________米.5分钟走________米.(   )

A:83,85

B:240,400

C:320,480

D:420,300

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答案(点此获取答案解析)

B

同类题2

2015年12月,被授予诺贝尔生理学或医学奖的屠呦呦在《青蒿素的发现:传统中医献给世界的礼物》的演讲中总结了她成功的经验,下面是节选的片段:

目标明确、坚持信念是成功的前提。1969年,我被指令负责並组建“523”項目课题组,承担抗疟中药的研发,我决心不辱使命,努力拼搏,尽全力完成任务!

学科交叉为研究发现成功提供了准备。从1959年到1962年,我参加西医学习中医班,系统学习了中医药知识。化学家路易·帕斯特说过“机会垂青有准备的人”。当抗疟项目给我机遇的时候,西学中的序曲为我从事青蒿素研究提供了良好的准备。我收集整理历代中医药典籍,走访名老中医并收集他们用于防治疟疾的方剂和中药、同时调阅大量民间方药。编写了以640种中药为主的《疟疾单验方集》。关于青蒿入药,最早见于马王堆三号汉墓的帛书《五十二病方》,其后的《神农本草经》、《补遗雷公炮制便览》、《本草纲目》等典籍都有青蒿治病的记载……中国传统中医药是一个丰富的宝藏,值得我们多加思考,发掘提高。

在困境面前需要坚持不懈。为了尽快上临床,在动物安全性评价的基础上,我和科研团队成员自身服用有效部位提取物,以确保临床病人的安全。团队精神,无私合作加速科学发现转化成有效药物。衷心感谢当年从事523抗疟研究的中医科学院团队全体成员,感谢全国523项目单位的通力协作。

同类题4

根据内容, 从对话后的选项中选出能填入空白处的最佳选项, 并在答题卡上将该项涂黑。选项中有两项多余选项。

    Everyone can benefit a lot from reading books. The following is about various benefits of reading books.

    ____ Whenever you read something, you learn information that you wouldn't have known. If you want to learn new words, reading books is a great way to enlargeyour vocabulary.

    ____ Similar to solving puzzles, reading books allows your mind to practice its processing skills. Going without books for too long will turn your mind into mess.

    One of the primary benefits of reading books is its ability to develop your thinking skills. ____ Wherever you are faced with a similar problem in real life, your mind is able to put its mystery solving skills to a test.

    The information in books can be referred to over and over again. For example, reading a cookbook allows you the chance to review the cooking steps whenever you need to. ____ Don't even think about writing the information down because you may lose the paper sooner or later.

    These are just some of the wonderful benefits of reading books. ____ If you can't even go outside, you can download free e­books online and read them on your computer. That way, you can see how useful reading can be for yourself.

A. You can improve your memory by reading.

B. Reading keeps your mind in good condition.

C. Reading books can make you become confident.

D. Reading books provides you with new knowledge.

E. Reading mystery novels, for example, trains your mind.

F. Following the steps from a cooking video will be difficult.

G. Why don't you drop into a bookstore and pick a book up?