题干

已知向量,若,则(    )

A:

B: 

C:

D:

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答案(点此获取答案解析)

C

同类题1

阅读下列短文,从每题所给的四个选项 (A 、B 、C  和 D )中,选出择最佳选项。

    Many people who work in London prefer to live outside it, and to go in to their offices or schools every day by train, car or bus, even though this means they have to get up early in the morning and reach home late in the evening.

    One advantage of living outside London is that houses are cheaper. Even a small flat in London without a garden costs quite a lot to rent (租住). With the same money, one can get a little house in the country with a garden of one's own.

    Then, in the country one can rest from the noise and hurry of the town. Even though one has to get up earlier and spend more time in trains or buses, one can sleep better at night and during weekends and on summer evenings, one can enjoy the fresh, clean air of the country. If one likes gardens, one can spend one's free time digging, planting, watering and doing the hundred and one other jobs which are needed in a garden. Then, when the flowers and vegetables come up, one has the reward of sharing the secret of Nature.

    Some people, however, take no interest in country things:for them, happiness lies in the town, with its cinemas and theatres, beautiful shops and busy streets, dance halls and restaurants. Such people would feel that their life was not worth living if they had to live it outside London. An occasional walk in one of the parks and a fortnight's (two weeks) visit to the sea every summer is all the country they want: the rest they are quite prepared to leave to those who are glad to get away from London every night.

同类题3

阅读理解

    Friends are important to children.Research shows that children who have no friends can suffer from difficulties later in life.Friendship provides children with more than just fun.In making friends,children learn how to get in touch with others and solve problems.Having friends even does good to children for they can help each other during class.

    If the parents are concerned about whether their children make many friends,what matters is that the child is comfortable and happy with his friends.Parents need to understand the steps children take in building friendships.First of all,be a friend to your child.Good friendships start at home.Children begin to develop the necessary ability to go out and meet others through getting along with their parents. Greet the child warmly and let him know you are glad to see him.Children learn a lot from how their parents stay with them and other people.

    Teach children how to solve conflicts(争端).Being able to work out conflicts is an important skill in getting along with others.If parents know the children have a conflict,let them work it out on their own.Only step in if it is really necessary,for example,an argument is getting physical.

    Give children chances to practice staying together.Have children play games that require cooperation. For example,races are fun and provide plenty of practice in teamwork.“In what ways didn't you work well together? What might you do differently next time?” For these ideas,see books such as Games Book by Telly Orlick and Team—Building by Alanna Jones.

    Encourage children to show thanks to others.The parents can encourage children to do this by setting the example for them.

同类题5

阅读下文,回答相关问题。

     【甲】十年春,齐师伐我,公将战。曹刿请见。其乡人曰:“肉食者谋之,又何间焉?”刿曰:“肉食者鄙,未能远谋。”乃入见。问:“何以战?”公曰:“衣食所安,弗敢专也,必以分人。”对曰:“小惠未徧,民弗从也。”公曰:“牺牲玉帛,弗敢加也,必以信。”对曰:“小信未孚,神弗福也。”公曰:“小大之狱,虽不能察,必以情。”对曰:“忠之属也。可以一战。战则请从。”
                                                                                                                                             (选自《曹刿论战》)
     【乙】于是入朝见威王曰:“臣诚知不如徐公美,臣之妻私臣,臣之妾畏臣,臣之客欲有求于臣,皆以美于徐公。今齐地方千里,百二十城,宫妇左右,莫不私王;朝廷之臣,莫不畏王;四境之内,莫不有求于王。由此观之,王之蔽甚矣!”
      王曰:“善。”乃下令:“群臣吏民,能面刺寡人之过者,受上赏;上书谏寡人者,受中赏;能谤议于市朝,闻寡人之耳者,受下赏。”令初下,群臣进谏,门庭若市。数月之后,时时而间进。期年之后,虽欲言,无可进者。燕、赵、韩、魏闻之,皆朝于齐。此所谓战胜于朝廷。
                                                                                                                                              (选自《邹忌讽齐王纳谏》)