在梯形ABCD中,AB∥CD,∠ABD=π6,∠ACD=π4,AC=922,AD

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问题:

在梯形ABCD中,ABCD,∠ABD=
π
6
,∠ACD=
π
4
,AC=
9
2
2
,AD=5,求BD的长.
考点:正弦定理
题型:解答题


A Recent Erymology of the Word "Culture"“文化”一词的新词源
Look in an old dictionary—say, a pre-1960 Webster’s—and you’ll likely find a definition of culture (1) looks something like this: "1.The cultivation of soil. 2.The raising, improvement, or development of some plant, animal (2) product. " This use of the word has its roots in the ancient Latin word cultura, "cultivation" or "tending," and (3) entrance into the English language had begun by the year 1430. By the time the Webster’s definition above was (4) , another definition had begun to take precedence over the old Latin denotation; culture was coming to mean "the training, (5) , and refinement of mind, tastes, and manners" (Oxford English Dictionary). The OED traces this definition, which today we associate (6) the phrase "high culture," back as far as 1805; by the middle of the 20th century, it was (7) becoming the word’s primary definition.
However, if you try a more modem source, like the American Heritage English Dictionary, (8) find a primary definition of culture which is substantially different than either of the two given above: "The totality (9) socially transmitted behavior patterns, arts, beliefs, institutions, and all other products of human work and thought. " Why such a (10) , and in such a (relatively) short period of time Well, in the past 40 years, the use of the (11) "culture" has been heavily influenced by the academic fields of sociology and cultural anthropology. These fields have gradually brought (12) was once a minor definition of culture (the last of eight definitions given in the old 1958 Webster’s quoted (13) ) into the mainstream.
It is easy to imagine how the US society which was so focused on "socially transmitted (14) patterns" in the sixties would come to need a word to describe the object of its interest. The civil (15) movement during this era brought everyone’s attention to bear on cultural differences within US society, while the Vietnam War (16) to emphasize the position of the US culture in relation to other world cultures.
Over time, these new uses (17) the word culture have eclipsed its older meanings, those associated with cultivation of the land and the production of (18) . You might say that an aspect of US culture over the past 40 years is its fascination with the (19) of culture itself—a fascination which has brought about many changes in the way we speak and the (20) of words which we commonly use.

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阅读下面文字,完成1 ~4 题。

南阳县君谢氏墓志铭

欧阳修

        庆历四年秋,予友宛陵梅圣俞来自吴兴,出其哭内之诗而悲日:“吾妻谢氏亡矣。”丐我以铭而葬焉。予未暇作。

        居一岁中,书七八至,未尝不以谢氏铭为言,且曰:“吾妻故太子宾客谢涛之女、希深之妹也。希深父子为时闻人,而世显荣。谢民生于盛族,年二十以归吾,几十七年而卒。卒之夕,殓以嫁时之衣,甚矣吾贫可知也。然谢氏怡然处之,治其家,有常法。其饮食器皿,虽不及丰侈,而必精以旨;其衣无故新,而浣濯缝纫必洁以完;所至官舍虽庳陋,而庭宇洒扫必肃以严;其平居语言容止,必怡以和。吾穷于世久矣,其出而幸与贤士大夫游而乐,入则见吾妻之怡怡而忘其忧,使吾不以富贵贫贱累其心者,抑吾妻之助也。吾尝与士大夫语,谢氏多从户屏窃听之,间则尽能商榷其人才能贤否,及时事之得失,皆有条理。吾官吴兴,或自外醉而归,必问曰:‘今日孰与饮而乐乎?’闻其贤者也则悦;否,则叹曰:‘君所交皆一时贤隽,今与是人饮而欢邪?’是岁南方旱,仰见飞蝗而叹曰:‘今西兵未解,天下重困,盗贼暴起于江淮,而天旱且蝗如此。我为妇人,死而得君葬我,幸矣!’其所以能安居贫而不困者,其性识明而知道理多类此。呜呼!其生也迫吾之贫,而殁也又无以厚焉,谓唯文字可以著其不朽。且其平生尤知文章为可贵;殁而得此,庶几以慰其魂,且塞予悲。此吾所以请铭于子之勤也。”若此,予忍不铭?(选自《欧阳修全集》,有删节)

1 .对下列句子中加粗词的解释,不正确的一项是( )

A.年二十以吾     归:出嫁

B.其平居语言容止     容止:形貌

C.谓唯文字可以其不朽   著:彰显

D.庶几以慰其魂     庶几:希望

2.下列句子中,全都表现梅圣俞夫妇情深的一组是(     )

①出其哭内之诗而悲

②其衣无故新,而浣濯缝纫必洁以完

③入则见吾妻之怡怡而忘其忧

④闻其贤者也则悦

⑤我为妇人,死而得君葬我,幸矣

⑥且其平生尤知文章为可贵

A.①②④

B.①③⑤

C.②③⑥

D.④⑤⑥

3.下列对原文有关内容的分析和概括,不正确的一项是(     )

A.梅圣俞在妻子去世后,请求好友欧阳修为她写墓志铭,后来在给欧阳修的多封信中,又一再提及此事。

B.谢氏出身于名门望族,但安贫乐道,治家有方,并且十分关心丈夫与士大夫的交往,是名副其实的贤内助。

C.西兵进攻江淮地区,随后又相继发生旱灾、蝗灾,谢氏仰天长叹,忧心忡忡,可见她关注百姓疾苦。

D.谢氏秉性明慧,懂得事理,时不时和梅圣俞探讨来访者才能高下,以及世事得失,都能讲得头头是道。

4.把文中画线的句子翻译成现代汉语。

(1)殓以嫁时之衣,甚矣吾贫可知也。

__________________________________________________________

(2)使吾不以富贵贫贱累其心者,抑吾妻之助也,

__________________________________________________________

(3)君所交皆一时贤隽,今与是人饮而欢邪?

__________________________________________________________

题型:解答题

下列关于幼儿园与幼儿家长沟通的策略说法错误的是()。

A.向家长宣传科学育儿的新观念

B.在相互理解和相互体谅中加强沟通

C.教给家长科学育儿的新方法

D.制订一套固定的方法来应对不同的家长

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转向架上设在轮对与()之间的悬挂装置称为一系悬挂。

A.构架

B.车体

C.钢轨

D.以上都不对

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电气事故主要有()等事故。

A.触电

B.雷电

C.火灾

D.静电

E.电磁场伤害

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