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新托福阅读词汇150题(93)：merge&expand

2015-08-14 10:55:45来源：网络

　　【新托福阅读词汇150题(93)：merge&expand】新托福TPO阅读中，词汇题是重要托福阅读题型。托福阅读词汇题做题需要考生掌握一定的词汇量和做题技巧。本文中新东方在线托福网汇总了新托福阅读词汇150题：merge&expand。

　　Paragraph 1: Photographic evidence suggests that liquid water once existed in great quantity on the surface of Mars. Two types of flow features are seen: runoff channels and outflow channels. Runoff channels are found in the southern highlands. These flow features are extensive systems—sometimes hundreds of kilometers in total length—of interconnecting, twisting channels that seem to merge into larger, wider channels. They bear a strong resemblance to river systems on Earth, and geologists think that they are dried-up beds of long-gone rivers that once carried rainfall on Mars from the mountains down into the valleys. Runoff channels on Mars speak of a time 4 billion years ago (the age of the Martian highlands), when the atmosphere was thicker, the surface warmer, and liquid water widespread. 【TPO8- Running Water on Mars?】

　　1. The word “merge” in the passage is closest in meaning to

　　○ expand

　　○ separate

　　○ straighten out

　　○ combine

　　答案见下一页：

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