在实验室进行的制取二氧化碳的活动与探索中,老师提供下列仪器: (1)图中仪器②

题型:实验题

问题:

在实验室进行的制取二氧化碳的活动与探索中,老师提供下列仪器:

 (1)图中仪器②的名称是                     ;

 (2)请你组装两套制取并收集二氧化碳的装置(填仪器的序号)。

方案一:                                        ;

方案二:                                        。

(3)小林很积极,另外安装了如右图所示的发生装置,
但小欣发现一处错误,这处错误是                
其造成的后果是                             
(4)制取二氧化碳选用的药品:稀盐酸和固体甲,
甲的名称是                        ;查阅资料知:浓盐酸具有挥发性,能挥发出氯化氢。

某同学用浓盐酸和甲在自己设计的(2)装置中制取CO2
并将该气体通入盛有紫色石蕊试液的烧杯中(如右图),
观察到烧杯中紫色石蕊试液变红。对这一变化的
合理解释是                      (填序号)。
A. 产生的CO2直接使石蕊试液变红B. 产生的CO2与水反应生成H2CO3使石蕊试液变红C. 挥发出的氯化氢溶于水使石蕊试液变红

(5)右图为小茜同学设计并进行有关CO2
性质的探究实验过程,烧杯中放置的是充有空气的气球。
请回答:该实验的实验目的是                       。
(6)检验CO2是否收集满的方法是                            。 
考点:二氧化碳的制取和收集常用仪器的名称和选用二氧化碳的性质实验
题型:实验题

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

When you are traveling, whether on business or for pleasure, you often need to stay in a hotel.小题1: There are small hotels with very few services, where the prices are low, or there are large hotels with all the very latest comforts, where you could spend all the money you have in the bank for one very comfortable night. 小题2: Some want to live, rather than just stay, in a hotel; the hotels which are designed to meet their needs are called residential(居住的) hotels.小题3: 

小题4: single rooms, for the use of one person, and double rooms, for the use of two people.

In addition, in large hotels, there are also suites(套房), which include two or more rooms connected together---perhaps a bed-room and a living room.小题5:

A.They are for people who are very rich or very important.

B.We have to choose which hotel is suitable for us.

C.The kind of hotel you choose probably is decided above all according to how much money you want to spend.

D.Do you know about the two kinds of rooms?E. However, most people who stay in hotels are either business people or tourists on holiday.

F. In most hotels, there are two kinds of rooms:

G. There are several different kinds of people who go to hotels.

题型:实验题

包装是()的起点。

A、供应物流

B、销售物流

C、生产物流

D、回收物流

题型:实验题

车一批精度要求不很高、数量较大的小偏心距的短偏心工件,宜采用()加工。

A、四爪单动卡盘

B、双重卡盘

C、两顶尖

题型:实验题

跨进站信号机装卸路料时,可按()办理。

A.跟踪出站调车

B.越出站界调车

C.封锁区间

D.停基改电

题型:实验题

相机的新增功能中,广角相机的镜头为多少?()

A.50MM

B.35MM

C.16MM

D.6MM

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