题干

已知向量 a→ =(3,1), b→ =(﹣2,4),求 a→ 在 b→ 方向上的投影为____.
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5
5

同类题1

阅读下面短文,从短文后各题所给的四个选项(A、B、C 和 D)中,选出可以填入空白处的最佳选项。

    I was looking at a picture recently and noticed there was something different. The frame (框架) was 1 The whole picture still looked good but I couldn't2whether or not changing the frame would make it better.

    From this an interesting 3 came to mind. At times when I was4 I would spend money on clothes. Because I have a love for 5 I thought I would feel good through buying new clothes. However, the feeling was always 6 Why? Because doing this didn't 7 the real issue. What I needed to do was to pay attention to what was bothering me on the inside 8 trying to cover up my problems by making changes on the outside. I was changing the frame but the picture on the 9was still the same.

    We may change the10of our hair or even buy new clothes. There is nothing wrong with doing this once or twice, but if it is being done for the wrong reasons, it may not 11 to how we really feel. If you12 there is something wrong, try to change that; this way you will truly feel better on the inside.13time with family, having a conversation with a friend, or even letting your pen write your innermost (最深处的) feelings can 14You will get true peace and joy inside 15This way, not only will you be better able to 16 your life but also display colorful images of love for others.

    So17 necessary, don't just change the frame. Change the picture. Getting a new picture may be 18 and may take time; however, with 19 it can be accomplished. In the end, playing your part in building a 20 of even more fine art in this world would be worth it!

同类题5

阅读《义田记》,完成第后面的题。
      范文正公①,苏人也。平生好施与,择其亲而贫、疏而贤者,咸施之。
      方贵显时,置负郭②常稔之田③千亩,号曰“义田”,以养济群族之人。日有食,岁有衣,嫁娶凶葬皆有赡。择族之长而贤者主其计,而时共出纳焉。日食,人一升;岁衣,人一缣④;嫁女者五十千⑤,再嫁者三十千;娶妇者三十千;再娶者十五千;葬者如再嫁之数,葬幼者十千。族之聚者九十口,岁入给稻八百斛⑥。以其所入,给其所聚,沛然有馀而无穷。屏⑧而家居俟代者与焉,仕而居官者罢莫给。此其大较也。
      初,公之未贵显也,尝有志于是矣,而力未逮者二十年。既而为西帅,及参大政⑨,于是始有禄赐之人,而终其志。公既殁,后世子孙修其业⑩,承其志,如公之存也。公虽位充禄厚而贫终其身。殁之日,身无以为敛,子无以为丧。惟以施贫活族之义,遗其子而已。
注释:①范文正公:范仲淹,字希文,卒谥文正。②负郭:靠近城郭。负,背倚。③常稔rěn 之田:常熟之田,良田。稔,庄稼成熟。④缣jiān :细密之绢。⑤千:一千钱为一贯。⑥斛hú :古代量器,以十斗为一斛。⑦沛然:充裕的样子。⑧屏:指罢官或离职。⑨参大政:指导范仲淹任枢密副使、参知政事。⑩修其业:指主持义田之事。