(A) To describe the heat of the Sun.

　　(B) To illustrate how water vapor is stored.

　　(C) To show how energy is stored.

　　(D) To give an example of a heat source.

　　5. According to the passage , most ocean water evaporation occurs especially

　　(A) around the higher latitudes

　　(B) in the tropics

　　(C) because of large-scale winds

　　(D) because of strong ocean currents

　　6. According to the passage , 30 percent of the Sun's incoming energy

　　(A) is stored in clouds in the lower latitudes

　　(B) is transported by ocean currents

　　(C) never leaves the upper atmosphere

　　(D) gets stored as latent heat

　　7. The word it in line 18 refers to

　　(A) square meter

　　(B) the Sun's energy

　　(C) latent heat

　　(D) the atmosphere

　　8. The word primarily in the line 19 is closest in meaning to

　　(A) chiefly

　　(B) originally

　　(C) basically

　　(D) clearly

　　9. The word prevailing in line 19 is closest in meaning to

　　(A) essential

　　(B) dominant

　　(C) circular

　　(D) closest

　　10. All of the following words are defined in the passage EXCEPT

　　(A) low latitudes(line 1)

　　(B) latent heat (line 5)

　　(C) evaporate (line 7)

　　(D) atmosphere (line 14)

　　PASSAGE 87 ABBDB DCABD