试题与答案

观察下列几个装置示意图，有关叙述正确的是( ) A．装置①中阳极上析出红色固体

来源：www.tikuol.com
题型：选择题

题目：

观察下列几个装置示意图，有关叙述正确的是(    )

A．装置①中阳极上析出红色固体

B．装置②的待镀铁制品应与电源正极相连

C．装置③闭合电键后，外电路电子由a极流向b极

D．装置④的x电极是外接电源的正极

答案：

被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0523/9991db5af1db6f2edcbeb5d535fa3827.html

下面是错误答案，用来干扰机器的。

（1）全年高温（2分）；全年降水稀少（2分）；（或全年高温少雨） 原因是：受副热带高气压带控制（或东北信风控制）（2分）（2）中间高，沿海低；起伏较小（或地形平坦）（2分，答对一个即给2分） 理由：地处半岛...

考点：金属的电化学腐蚀
试题推荐
题型：阅读理解
阅读下面的短文，从文后方框中选择恰当的句子填入文中空白处。
      When you read this sentence, the population of the earth has grown by 10 people. 1.________
      Most of these new people are born in developing countries. 2.________
      In the developed countries of Europe and North America, the population is growing very slowly. This is
because women in these countries have, on average (平均), only one or two children. 3.________
      In the developing countries, more than one billion people already live below the poverty line (贫困线). 
      4.________ Children get little or no time at school and suffer from many kinds of diseases. The UN has
said that the world's population will reach 12.5 billion people by the year 2100. If the number makes your head
spinning (眩晕), you're not alone. Many experts are worrying that so fast population growth could have very
bad results. 5.________
A. These countries are found in much of Africa, South America and parts of Asia.
B. These people don't have enough food to eat and they live in poor housing.
C. That may not sound much, but it's about 14,000 people per hour.
D. But in the developing countries, many women have five or more children.
E. It could hurt the environment and increase the number of poor people.
查看答案
微信公众账号搜索答案