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完形填空。 Red is the color of China. Among all the 1 , red id most easily seen. The color red is fresh and pure, 2 in China we call it China Red. Chinese people are attracted by the color red not only because it makes people excited, but also because it has 3 meaning in Chinese culture and history. No country in the world has ever 4 a color in such a way as China. Here, red is a symbol.It gives color to the soul (灵魂) of the nation.In the past, red represented dignity (尊严) and mystery. Even now Chinese people 5 the color much more than we do. It can be said that 'China Red' is an everlasting theme for China, and an 6 color for the Chinese people 'China Red' has 7 a very popular word, attracting the world's attention. Finding red-colored things in China is very 8 , as you can see the color everywhere. All traditional red things have been playing special 9 in China, the walls of ancient palaces, the 10 flag, Chinese knots, lanterns, traditional paper- cuts, and even red tauhulu. Red is the color of the 11 , health, harmony, happiness, peace, richness and so on. Only real things and events can fully 12 and explain its beauty. The color can be 13 and meaningful only when it's connected with people. In China, red is more than just a color. It carries the ancient history and 14 of the Chinese nation. China Red is 15 with mysterious charm beyond description and it is right here in China waiting for you to feel, to discover! (     )1. A.colors (     )2. A.but (     )3. A.poor (     )4. A.used (     )5. A.need (     )6. A.interesting (     )7. A.spoken (     )8. A.hard (     )9. A.roles (     )10. A.national (     )11. A.rainbow (     )12. A.believe (     )13. A.large (     )14. A.art (     )15. A.pleased B.news B.or B.rich B.shared B.dislike B.expensive B.said B.easy B.games B.international B.fear B.show B.quiet B.culture B.crowded C.papers C.and C.simple C.drawn C.hate C.easy-going C.become C.sudden C.cards C.local C.worry C.talk C.alive C.business C.filled D.paints D.while D.correct D.affected D.love D.important D.got D.warm D.places D.foreign D.luck D.write D.peaceful D.ability D.satisfied
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【简答题】某温度下,物质X 2 SO 4 的饱和溶液密度为ρg·mL -1 ,C(X + )=' c' mol·L -1 ,溶质的质量分数为a%,溶质的摩尔质量为Mg·mol -1 ,溶解度为S g ,下列表达式正确的是
【简答题】(5分)现有m g某气体,它由四原子分子构成,它的摩尔质量为M g·mol - 1 ,则: (1)该气体的物质的量为 mol. (2)该气体中所含的原子总数为 个. (3)该气体在标准状况下的体积为 L. (4)该气体溶于1 L水中(不考虑反应),其溶液中溶质的质量分数为 . (5)该气体溶于水后形成V L溶液,其溶液的物质的量浓度为 mol·L - 1 .
【判断题】若对任意的 ,都有 ,则函数 的图象关于 对称( )
A.
正确
B.
错误
【简答题】已知某金属元素M的化合价为+3价.其氧化物中该金属元素的质量分数为70%,试求该氧化物的相对分子质量______.
【单选题】二级公路填方地段,路床顶面以下0~80cm的路基压实度应不小于()。
A.
83%
B.
94%
C.
90%
D.
95%
【简答题】(1)在9.5g某二价金属的氯化物中含0.2mol Cl — ,此氯化物的摩尔质量为 ;该金属元素的相对原子质量为 。 (2) 已知N 2 、CO 2 的混合气体的质量共10.0克,标准状况下,体积为6.72L,原混合气体中N 2 、CO 2 的体积之比 .
【简答题】脊神经节是( )细胞迁移分化产生。
【简答题】(4分) 现有m g某气体,它由双原子分子构成,它的摩尔质量为M g·mol -1 。则: (1)该气体的物质的量为 。 (2)该气体在标准状况下的体积为 L。
【判断题】奈奎斯特图描述的是连续时间的线性非时变系统,将其频率响应的增益及相位以极坐标的方式绘出,常在控制系统或信号处理中使用,用来判断一个系统是否稳定 。
A.
正确
B.
错误
【单选题】已知 是定义在R上的函数,对任意 都有 ,若函数 的图象关于直线 对称,且 ,则 等于(     )
A.
2
B.
3
C.
2011
D.
-2011
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