5. The word "resemble" in line 14 is closest in meaning to

　　(A) result from

　　(B) penetrate

　　(C) look like

　　(D) replace have similar origins

　　6. According to the passage , the layers in varves are primarily formed by

　　(A) fossilized bacteria

　　(B) pieces of ancient dropstones

　　(C) a combination of ancient and recent sediments

　　(D) annual cycles of sediment transport and deposition

　　7. The phrase "the other" in line 17 refers to another

　　(A) annual cycle

　　(B) glacial lake

　　(C) layer of sediment

　　(D) season

　　8. According to the passage , the presence of dropstones indicates that

　　(A) the glacial environment has been unusually servere

　　(B) the fine-grained sediment has built up very slowly

　　(C) there has been a global ice age

　　(D) coarse rock material has been carried great distances

　　9. Why does the author mention Canada, North America, Africa, India, and Europe in lines 23-24?

　　(A) To demonstrate the global spread of dropstones

　　(B) To explain the principles of varve formation

　　(C) To provide evidence for the theory that there was a global ice age in the early Proterozoic eon

　　(D) To illustrate the varied climatic changes of the Proterozoic eon in different parts of the globe

　　10. Which of the following terms is defined in the passage ?

　　(A) fossil record (line 3)

　　(B) laminae (line 13)

　　(C) varves (line14)

　　(D) glacial episodes (line 28)

　　參考答案：ABDAC DCCCC