生产关系是最活跃、最革命的因素,是社会发展的最终决定力量。

题型:判断题

问题:

生产关系是最活跃、最革命的因素,是社会发展的最终决定力量。

考点:地球科学旅游学旅游学题库
题型:判断题

设阿伏加德罗常数的数值为NA,下列说法正确的是:

A.250mL2mol·L-1的氨水中含有NH3·H2O的分子数为0.5NA

B.0.1 mol铁在0.1 mol Cl2中充分燃烧,转移的电子数为0.2 NA

C.1 L 0.5 mol·L-1 Na2CO3溶液中含有的CO32数为0.5NA

D.t℃时,pH="6" 的纯水中含有OH的个数为10-6NA

题型:判断题

读下图,回答1~3题。  

1. 甲、乙两地耕作制度不同,造成这种差异的主要自然因素是[     ]

A.海拔       

B.热量     

C.水分      

D.土壤 

2. 甲、乙两地共有的地理现象是[     ]

A.广泛种植水稻                  

B.水运发达 

C.冬季河流结冰                  

D.雨热同期

3. 目前甲、乙两地可持续发展所面临的主要问题分别是[     ]

A.土地盐碱化、多洪涝灾害 

B.多风沙危害、水资源短缺 

C.水土流失严重、多旱涝灾害 

D.水土流失严重、酸雨危害较严重  

题型:判断题

Until a century ago, bloodletting was used to treat many ailments. Dating back to before the time of Christ, the treatment involved letting a type of worm, called a leech, such blood from the patient. People believed that there were liquids called humors in the body and that these determined a person’s personality and heath. Bloodletting, they thought, restored a balance to these humors.

At the time, little was known of the working of the human body, but people did know that the same liquid, blood, flowed throughout everyone’s body. They knew it was a vital substance, for loss of any great amount of it meant certain death. Thus, they concluded that all diseases were carried in the bloodstream, and that if the body was relieved of bad blood, heath would return. Bloodletting, however, came to be used as a cure-all. Woman were bled to keep them from blushing while members of the clergy were bled to prevent them from thinking sinful and worldly thoughts.

From the 11th to the 18th centuries, barbers were the people to go to if you needed to be bled. This custom explains the significance of the traditional barber’s pole: the white stripes stand for bandages and the red stripe for blood.

1. This passage is concerned about            .

healthy people and doctors                         B. bleeding as a cure-all

C. barbers of long ago                                      D. leeches with special jobs to do

2. The red and white stripes on barber pole symbolize         .

sin and redemption                             B. the bleeding form

C. women who are nurses                                  D. humors in the body

3. Why is bloodletting no longer considered a cure-all?

Because more is known about the workings of the human body.

Because leeches were outlawed

Because barbers were too busy cutting hair.

Because today we know that blood is necessary for health

4. In the second paragraph, the word “Thus” could be replaced by the word       .

A. When                        B. However                  C. If                            D. So

5. Ailments means           .

A. cures                         B. women                     C. disease                     D. medicines

题型:判断题

水浸法检验中衰减最快的波形是()。

A、纵波

B、横波

C、切变法

D、表面波

题型:判断题

城市公共财政的首要任务是( )。

A.优化资源配置
B.调控经济波动
C.调节收入分配
D.进行城市的建设与维护

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