Students pay close attention to the sounds of nature.

9. The answer is that reading is very important. We should always read books and read good books.

Second, reading and exploring.

(1) 10. Latitude and longitude, competition, ancient and modern 1 1. The first sentence of each paragraph 12. From primary to secondary, from space to time. This shows that these four factors play different roles and degrees. 13. Affected by the height difference, phenological phenomena such as flowering of plants are getting bigger and bigger in spring and summer. 14. Wrong. Because at the same latitude, anywhere near the sea is milder in winter than inland, and colder in spring than inland. 15. Examples, figures and comparisons are 16. "The former" refers to the average date 174 1 to 1750 of flowering of seven trees in early spring, while the latter refers to 192 1 to 65438.

(2) 17. Cloning crucian carp

18. Introduce the process of cloning crucian carp to people.

19. Without the combination of male and female cells, the egg cell is only replaced by the nucleus of a blastocyst cell, which is actually produced by the egg with nuclear change, so it is called "cloned fish".

20. Tip: Grasp the key words.

2 1. For example, "In the end, only one young fish survived."

(3) 22. Crow is a wise man among birds. (Answer "Zhuge in the bird" can't score)

Compare paragraphs (3) and (7)

Pet-name ruby column number (column data)

24, C 25, ① Crows like to eat rotting animal carcasses; (2) Crows have a very sensitive sense of smell, and they can smell the rotting corpse at a long distance; (3) Patients will release the smell of corruption before they die, and crows have heard about it before they die. 26, paragraph: ⑦ 8 Revelation: Birds still know how to honor their parents and appreciate the help of others, especially humans.