A.It collapsed at least once in the past 1.3 million years.
B.It sits firmly on solid rock at the bottom of the ocean.
C.It melted at temperatures a bit higher than those of today.
D.It will have little impact on sea level when it breaks up.
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单选题 | What does Brian Greene imply by saying “... it would be a lot harder for him to be heard” (Lines 1-2, Para. 9)? | 查看答案 |
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单选题 | In its 1994 report, the World Bank argued that the current pension system in most countries could ______. | 查看答案 |
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单选题 | What do scientists seem to agree upon, judging from the first two paragraphs? | 查看答案 |