新鲜水果、蔬菜、乳制品中富含的维生素C，具有明显的抗衰老作用，但易被空气氧化。某

发布时间：2017-06-16 13:40 │ 来源：www.tikuol.com

题型：选择题

问题：

新鲜水果、蔬菜、乳制品中富含的维生素C，具有明显的抗衰老作用，但易被空气氧化。某课外小组利用碘滴定法测某橙汁中维生素C的含量，其化学方程式如下：

下列说法正确的是

A．上述反应为取代反应

B．维生素C在酸性条件下水解只得到1种产物

C．维生素C具有氧化性

D．脱氢维生素C的分子式为C₆H₆O₆

考点：结构简式结构式

题型：选择题

完形填空。

     Marc sat next to me when we were in Hill Junior School. He had a serious    1   in communicating with
people. One always had to guess what he was saying.     2   , most of my classmates did not like to be with
him because his hands and shirts were always    3    . I tried to let him know the importance of being clean
by    4   him several times a day to wash his hands. But he just could not understand. 　　
     One day, our teacher Miss West walked up to Marc.    5   saying anything, she took Marc to the
washroom. Slowly, Miss West washed his    6   and told him that he should keep himself clean. She did
that every day for one month.    7   , Marc understood. 　　
     Miss West's love has given me a good example to follow when I    8   my job. I always remember to
teach my students by showing them the right    9   to do things. And most important of all, I always
remember to give them    10   to learn and to grow up.

(       )1. A. question
(       )2. A. Instead
(       )3. A. dirty
(       )4. A. talking
(       )5. A. With
(       )6. A. face
(       )7. A. At last
(       )8. A. did
(       )9. A. ways
(       )10. A. more advice

B. problem
B. However
B. clean
B. saying
B. Without
B. feet
B. At first
B. am doing
B. answers
B. less advice

C. accident
C. Besides
C. new
C. speaking
C. After
C. shirts
C. Such as
C. have done
C. time
C. more time

D. hobby
D. Except
D. old
D. telling
D. Above
D. hands
D. So far
D. am going to do
D. food
D. less time

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题型：选择题

阅读下列材料：

材料一恩格斯说：“新生的工业能够这样成长起来，只是因为它用机器代替了手工工具，用工厂代替了作坊，从而把中等阶级的劳动分子变成了工人无产者，把从前的大商人变成了工厂主，它排挤了小资产阶级，并把居民间的一切差别化为工人和资本家之间的对立。”

材料二马克思在《 * * 党宣言》中指出：“ 资产阶级由于一切生产工具的迅速改进，由于交通的极其便利，把一切民族甚至最野蛮的民族也卷进文明中来了，它的商品的低廉价格，是它用来摧毁一切万里长城、征服野蛮人最顽强抵抗的仇外心理的重炮。这它迫使一切民族——如果它们不想灭亡的话——采用资产阶级的生产方式……它按照自己的面貌为自己创造出一个世界。”

请回答：

（1）结合材料一，说明工业革命的核心内容。

（2）根据材料一概括说明工业革命带来的社会关系的变化。

（3）材料二中说的“文明”是指什么？

（4）材料二分析的资本主义统治世界的原因是什么？其核心是什么？

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题型：选择题

生产过程是指从生产技术准备开始直到产品制造出来为止的全部过程。它是把生产运营资源的投人转换成产出的过程。生产运营资源由人力、场所、部件、工艺等组成，简称()。

A.4P

B.5P

C.6P

D.10P

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某项目建设期初的建安工程费和设备工器具购置费为2000万元，建设期两年，第一年计划投资60%，年价格上涨率为5%，则第二年的涨价预备费为（）万元。

A．123

B．82

C．40

D．60

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题型：选择题

鼓风中含氧增加1%，理论上高炉可提高产量（）。

A.1.0%

B.2.1%

C.3.71%

D.4.76%

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