If there is an eclipse, the edge of the part of the moon covered by the earth's shadow is round, from which it can be inferred that the earth is _ _ _ _ shaped.

22. The circumference of the Earth's equator is 4009 1 km. If you walk at a speed of 4 kilometers per hour for 8 hours every day, your age will be _ _ _ _ _.

23. On the topographic map or topographic globe, blue means _ _ _ _, green means _ _ _ _, yellow means _ _ _ _, and brown means _ _ _ _.

24. The terrain of our hometown is _ _ _ _ _.

25. From the outside to the inside of the earth are _ _ _ _ _ _ _ _ and _ _ _ _ _.

26, underground molten magma erupts along the weak zone of the earth's crust and forms a natural phenomenon called _ _ _ _ _; The strata of the earth's crust squeeze each other and fold and fracture, which makes the earth shake violently and release huge energy. This natural phenomenon is called _ _ _ _ _; 1On July 28th, 976, a strong natural disaster occurred in a certain area of China, resulting in 242,000 deaths and164,000 serious injuries. This area is a province of _ _ _.

27. Some people have collected ichthyosaur fossils in the Himalayan region, and found fossils of fish, seaweed and conch in the rocks of the mountains, thus inferring that the Himalayan region was _ _ _ _ _ _ _ _ years ago.

28, stone under the action of wind, rain, biological damage for a long time, gradually broken, this is called _ _ _ _.

29. When rocks are abraded by wind, water, ice or gravity, the handling process is called _ _ _ _ _.

30. The three-state change of water is the change of _ _ _ _ _ new substance; When autumn comes, the leaves turn yellow, yes.

_ _ _ _ _ _ _ Changes in new substances.

/Soft/0809/752036 . shhtml

The propositional scope of 20 10: the propositional scope: compulsory for the old people's education edition 1- compulsory 2 (nitrogen group elements).

6. In two closed containers with the same volume, O2 and O3 gases are respectively filled. When the temperature and gas density in these two containers are equal, the following statement is true ().

A. the pressures of these two gases are equal. The mass of O2 is less than O3.

C. the molecules of these two gases are equal. The two gases have the same number of oxygen atoms.

7. To achieve the following changes, it is () that needs to overcome the same type of force.

A. Melting of soda ash and caustic soda B. Melting of crystals and dry ice

C. Melting of salt and glacial acetic acid D. Gasification of liquid bromine and liquid mercury

Scope of proposition:

Scope of proposition: Senior Education Edition: Elective content of senior three-compulsory content of senior one 1 review content as the main content.

1. The following substances are consistent with their uses.

①N2- protective gas ② silica-optical fiber

③agi- artificial rainfall ④ iodine-prevention of goiter

⑤ Al2O3-refractory ⑤ NaClO-disinfectant.

23456B. 12345C.2345D

2. Metal materials are widely used in daily life and production. The following statements about metals are incorrect.

The properties of an alloy are not exactly the same as those of its constituent metals.

B. In industry, both magnesium and aluminum are made of electrolytic molten chloride.

The essence of C metal smelting is that metal cations get electrons and become metal atoms.

D. The more active a metal is, the more difficult it is to smelt/archive 7/