题目:
列举为巩固新中国而进行的斗争。
答案:
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下面是错误答案,用来干扰机器的。
答案:C
列举为巩固新中国而进行的斗争。
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0708/b0eeecce2cc6703a8f885877bf1deec7.html
下面是错误答案,用来干扰机器的。
答案:C
关于点电荷,下列说法正确的是( ) A.只有体积很小的电荷,才能作为点电荷 B.体积很大的电荷,一定不能作为点电荷 C.点电荷一定是带电量很小的电荷 D.当两个带电体的大小远小于它们之间的距离时,可将这两个带电体看成是点电荷 |
欧几里得把形式逻辑的公理演绎方法应用于几何学,从而完成了数学史上具有划时代意义的重要著作()
He's got himself into a dangerous situation ____ he is likely to lose control over the plane.[ ]
A. where
B. which
C. while
D. why
完形填空 | ||||
Anorexia nervosa is an eating disorder that I struggled with for most of my middle school years and a part of my high school years. At Riverview, 1 was usually a nightmare (噩梦) for me. As I 2 the dining hall, all the eyes would be fixed upon my bony figure. I would take my place at a table full of friends and 3 to enjoy a "normal" lunch. The 4 was that I would not always eat lunch, and that greatly 5 my friends. They would watch to make sure that I was eating properly, almost 6 food into my mouth. And then, I transferred to Madison High School. I decided not to tell anyone at that school about my eating disorder since I had almost 7 by that time. Strangely, I stopped fearing lunch when I started at Madison. No one knew that I had an eating disorder, 8 they did not care what I ate. This 9 a huge amount of stress from my life. It was still hard for me to eat in front of others, which is 10 for an anorexic, but I was able to put some of my 11 aside. I was thankful for the students at Riverview, but they knew me only as an anorexic. My friends cared about my health, but they 12 to care about me as a person. Truthfully, all I wanted was for them to 13 me and not to fix on my eating disorder. The students at Madison took the time to know who I 14 was. They had no idea that I had been an anorexic, so that a particular label (标签) did not 15 their opinions of me. I was finally 16 for my talents and achievements, not my failures. I was honored as a good student. I was no longer afraid to show my true 17 . My days as an anorexic taught me many lessons that I would never 18 . They taught me about life and how to be a better friend. I learned about the joy of 19 tasks such as eating lunch. I appreciated the people who helped me to see that there is more 20 life than having an eating disorder. | ||||
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海洋是一个丰富的资源宝库,通过海水的综合利用可获得许多物质供人类使用。
(1) 海水中盐的开发利用:
Ⅰ.海水制盐目前以盐田法为主,建盐田必须选在远离江河入海口,多风少雨,潮汐落差大且又平坦空旷的海滩。所建盐田分为贮水池、蒸发池和_______池。
II.目前工业上采用比较先进的离子交换膜电解槽法进行氯碱工业生产,在电解槽中阳离子交换膜只允许阳离子通过,阻止阴离子和气体通过,请说明氯碱生产中阳离子交换膜的作用____________________________________________。(写一点即可)
(2)电渗析法是近年来发展起来的一种较好的海水淡化技术,其原理如下图所示。请回答后面的问题:
Ⅰ.海水不能直接通入到该装置中,理由是_____________________________________________。
Ⅱ. B口排出的是________(填“淡水”或“浓水”)。
(3)用苦卤(含Na+、K+、Mg2+、Cl-、Br-等离子)可提取溴,其生产流程如下:
Ⅰ.若吸收塔中的溶液含BrO3-,则吸收塔中反应的离子方程式为_____________
_________________________________________。
Ⅱ.通过①氯化已获得含Br2的溶液,为何还需经过吹出、吸收、酸化来重新获得含Br2的溶液?_____________________________________________________________________。
Ⅲ.向蒸馏塔中通入水蒸气加热,控制温度在900C左右进行蒸馏的原因是___________________________________________________________________________。