题干

某植物的有色籽粒与无色籽粒是一对相对性状,实验一和实验二是为探究粒色遗传特点而做的杂交实验,如图所示。回答下列问题:

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同类题1

阅读理解

    Have you ever noticed what happens to an idea once you express it? Just talking about it or writing it down causes you to make it clear in your own mind. How can you use this to increase your brain power? Start writing.

    By putting thoughts into words, you are telling yourself the logic(逻辑)behind what you think, feel, or only partly understand. Often, explaining a thought is the process of understanding. In other words, you increase your brain power by exercising your “explain power.”

    Try this experiment. Explain how you'll increase your brain power, even if you have no idea right now. Just start with anything, and create an explanation. For example, start with “I'll learn chess,” or “I'll read an article on the mind every week.” Explain how that will help. You'll be surprised how often this becomes a workable plan, and if you actually do this, you'll have a better understanding of your brain from now.

    Another benefit of writing is that it helps you remember. Many, if not most, highly productive people are always taking notes. You can try keeping it all in your head, but if you keep a journal of your ideas the next time you're working on a big project, you'll probably have more success.

    Want to understand a topic? Write a book about it. That's an extreme example, but if you are learning something new, write a letter to a friend about it, and you will understand it better. Want to invent something? Write an explanation of the problem, why you want to solve it, and why it is worth solving, and you're half-way there.

    Writers don't always write because they clearly understand something beforehand. Often, they write about something because they want to understand it. You can do the same. Writing will help bring you to an understanding. Give it a try.

同类题4

阅读下面的文言文,完成下列各题。

    袁涣字曜卿,陈郡扶乐人也。父滂,为汉司徒。当时诸公子多越法度,而涣清静,举动必以礼。郡命为功曹,郡中奸吏皆自引去。后辟公府,高第,迁侍御史。

    谯令,不就。刘备之为豫州,举涣茂才。后避地江、淮间,为袁术所命。术每有所咨访,涣常正议,术不能抗,然敬之不敢不礼也。顷之,吕布击术于阜陵,涣往从之,遂复为布所拘留。布初与刘备和亲,后离隙。布欲使涣作书詈辱备,涣不可,再三强之,不许。布大怒,以兵胁涣曰:“为之则生,不为则死。”涣颜色不变,笑而应之曰:“涣闻唯德可以辱人,不闻以骂。使彼固君子邪,且不耻将军之言,彼诚小人邪,将复将军之意,则辱在此不在于彼。且涣他日之事刘将军,犹今日之事将军也,如一旦去此,复骂将军,可乎?”布惭而止。

    布诛,涣得归太祖。是时新募民开屯田,民不乐,多逃亡。涣白太祖曰:“夫民安土重迁,不可卒变,易以顺行,难以逆动,宜顺其意,乐之者乃取,不欲者勿强。”太祖从之,百姓大悦。迁为梁相。以病去官百姓思之后徽为谏议大夫前后赐甚多皆散尽之家无储终不问产业乏则取之于人不为曒察之行然时人服其清。

    魏国初建,为郎中令,行御史大夫事。涣言于太祖曰:“今天下大难已除,文武并用,长久之道也。以为可大收篇籍,明先圣之教,以易民视听,使海内斐然向风,则远人不服可以文德来之。”太祖善其言。时有传刘备死者,群臣皆贺,涣以尝为备举吏,独不贺。居官数年卒,太祖为之流涕,赐谷二千斛。文帝闻涣昔拒吕布之事,问涣从弟敏:“涣勇怯何如?”敏对曰:“涣貌似和柔,然其临大节,处危难,虽贲育不过也。”

(节选自《三国志·魏书》第十一,有删改)