问题
单项选择题
丙型肝炎病毒是一种（）病毒.
A.RNA.
B.DNA.
答案
参考答案：A
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丙型肝炎病毒是一种（）病毒.
A.RNA.
B.DNA.
参考答案：A
| 阅读下面短文，掌握其大意，然后从 各题所给的四个选项（A、B、C 和D）中，选出最佳选项。 |
| Australia is an island and it is a continent. It is the largest island in the world but it is the smallest continent. It is almost 7.7million sq. km. Compared with China, China is about 2 million sq. km. larger. Australia is in the south of the world. It lies between the Indian Ocean and the Pacific Ocean. The Indian Ocean is to the west and the south. The Pacific Ocean is to the east. Most of the western half of Australia is highland. But it is not very high, and the land is rather flat (平坦). High flat land is not called mountains. It is called Plateau. The west of Australia is called the Western-Australian Plateau. It is about 300 m high. There is high land in the east of Australia, too. Some of it is plateau and some of it is mountains. The highest mountain is in the southeast. It is called MT Kosciusko. It is 2228 m high. This high land in the east is sometimes called the Great Dividing Range. It has this name because it divides the east coast from the rest of the country. Between the Great Dividing Range and the western Australian Plateau the land is low. This part of the country is called the Central Lowlands. The only big river in Australia is the River Murray. It begins in the mountains in the southeast of the country and it runs westward into the Indian Ocean. |
| 1. Australia is . |
[ ] |
| A. a big island B. the largest one of the islands in the world C. a small island D. the largest one of the continents in the world |
| 2. Most of the western half of Australia is . |
[ ] |
| A. very high B. mountain C. flat land D. plateau |
| 3. MT Kosciusko is . |
[ ] |
| A. in the southeast B. in the west C. in the east D. plateau |