[Chongqing Guangdong education] National Open University 2047t commercial bank operation and management reference test in autumn 2018

Test paper code ：2088

Fundamentals of Natural Science test questions （ Open book ）

2019 year 1 month

One 、 Multiple choice questions （ The answers to the questions are in the alternatives , Only 1 Item is correct , Please answer correctly The serial number of the case , Fill in the brackets in the question . Every little question 2 branch ,6 A little question , common 12 branch ）
1． Acceleration refers to ( ).
A. The result of adding several speeds
B． Changes in speed
C． The ratio of the change in speed to the time taken
D． The movement phenomenon of increasing speed
2． The internal energy of an object refers to ( ).
A． The kinetic energy of the thermal motion of molecules
B． Potential energy between molecules
C． The sum of kinetic energy and molecular potential energy of molecular thermal motion
D． The sum of kinetic energy and molecular potential energy of the thermal motion of all molecules in a body
3． The hardness of water refers to ( ).
A. The water turned into ice is very hard
B． Water contains iron 、 Hard objects such as stones
C． Calcium in water 、 Magnesium and other salts
D． Wood in water 、 Sediment and other sundries
4． Transpiration refers to ( ).
A. Water evaporates from the ground
B． The water is dried from the clothes
C． Water flows from the plant surface in a gaseous state （ Mainly leaves ） The phenomenon of being lost outside the plant
D． Sweat is sucked dry
5． Metabolism means ( ).
A． Produce new substances to replace old substances
B． The general term for all ordered chemical changes in living cells
C． get rid of the stale and take in the fresh
D． Birth, death, illness and old age
6． Biodiversity refers to ( ).
A. Various colors of living things
B． The universality of biological distribution
C． The age of biological distribution
D． The sum of all life on earth

Two 、 Judgment questions （ Every little question 2 branch ,12 A little question , common 24 branch ）
7． Chemical reactions are exothermic .( )
8. Objects will move only when they are forced .( )
9． When you sweat a lot after strenuous exercise , Easy to catch cold , It is because the evaporation of water will release heat .( )
10. Snowy days are warmer than snowmelt days , Because melting snow needs to absorb heat .( )
11． Human blood circulation is divided into two ways: systemic circulation and pulmonary circulation , They are called big cycle and small cycle respectively .( ]
12. Fresh water is completely salt free water .( )
13. Light year is the expression of time .( )
14. Metabolism is the general term for all orderly chemical changes in living cells .( )
15. Genetic diversity is also called genetic diversity .( )
16. Genes have genetic effects DNA fragment .( )
17. The place with the strongest magnetism on the magnet is called the magnetic pole .( )
18. The main components of the sun are air and carbon dioxide .( )

3、 ... and 、 Completion （ Every little question 2 branch ．8 A little question , common 16 branch ）
19. The essence and core of scientific spirit is seeking truth from facts 、 Advocating science 、 do away with all fetishes and superstitions , That is, all knowledge must go through , At the same time, we should oppose superstition and boasting about all mysterious things .
20. Ohm's law shows , The current through the conductor I It is proportional to the voltage at both ends of the conductor , With the resistance of the conductor
21. The three main points of molecular dynamics theory are ： Matter is made up of a large number of molecules . Molecules are doing The movement of , There are interactions between molecules .
22. The biological classification system adopts the hierarchical subordination , Divide into circles 、 door 、 、 Objective 、 Families, 、 Belong to 、 There are seven grades .
23. Three important heating organic substances in nutrients are ： sugar 、 And grease .
24. The three acids commonly used in production and life are ： hydrochloric acid 、 Sulfuric acid 、 .
25． The main types of biological reproduction are And sexual reproduction .
26. The three levels of biodiversity refer to ： Genetic diversity 、 And ecosystem diversity .

Four 、 Calculation questions （8 branch ）
27. The electromotive force of the power supply is 6V, The internal resistance is 0.5Ω, The resistance of the external circuit is 4Ω, How big is the terminal voltage ？

5、 ... and 、 Short answer （ This topic 12 branch .4 A little question ： Physics 、 chemical 、 biological 、 Geoscience has one problem each Objective , Choose one of them 1 Complete four topics ）
28. Briefly describe the law of energy transformation and conservation .

29. What is? “ The greenhouse effect ”？ The main “ greenhouse gases ” What are they? ？

30. What is the important role of protein in life activities ？

31． Why do ocean tides occur ？

6、 ... and 、 A treatise （ This topic 28 branch ）
32. Try to briefly describe the evolution of organisms on earth .（ It is required to explain or give examples appropriately ）