问题
填空题
下表列出了1 cm3活性炭在常温常压下所能吸附的常见气体的体积，试分析活性炭吸附气体的难易跟气体的哪些性质有关 。
答案
与气体的沸点有关，沸点越高，越易吸附。
从表格中的数据可以看出，氯气的沸点最高，吸附得最多；氢气的沸点最低，吸附得最少，其他气体也有类似的规律。
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下表列出了1 cm3活性炭在常温常压下所能吸附的常见气体的体积，试分析活性炭吸附气体的难易跟气体的哪些性质有关 。
与气体的沸点有关，沸点越高，越易吸附。
从表格中的数据可以看出，氯气的沸点最高，吸附得最多；氢气的沸点最低，吸附得最少，其他气体也有类似的规律。
How good projects grow ARE you interested in project（项目，课题） and want to have a good one? Well, that doesn’t come easily. You need to do the following tasks: TALK: You and your classmates discuss in detail（详细地） all that you would like to do to realize （实现）your project. WRITE: One of your classmates acts as （担任）secretary（秘书） . He or she keeps full notes as your group discusses. Later he or she will sort （整理）your ideas to make them better. PLAN: With the secretary’s notes, your group makes a list of everything you’ll need and who will get, do or research what. DO: Each group member gets, does and researches something on the list. Your group puts together all you have found and tried to make the project more well-organized. You prepare （准备）to present（展示） it in class. SHOW: You and your classmates show the world the result of your hard work. Knowing all the above , you may want to try a project. Why not start with this: you can find out more about the history of your city. What did it look like? Which famous people lived there?
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(每题的备选项中，有2个或2个以上符合题意，至少有1个错项。)
| 某市政工程公司中标一座污水处理工程，该工程采用二级污水处理工艺。工程项目中含一座排水泵站工程，采用沉井法施工。泵站直径18m，高14m，土层主要为黏土质砂土，项目部采用水枪冲土法下沉，用水力吸泥机吸泥。沉井采用泥浆套润滑减摩；沉井下沉至设计标高后，对减摩泥浆进行了置换。 |
常用的置换减摩泥浆的凝固材料有( )。
A．水泥浆
B．水泥砂浆
C．膨润土泥浆
D．水玻璃
E．聚胺酯