网址:http://m.1010jiajiao.com/timu3_id_2523014[举报]
|
阅读下列短文, 从所给的四个选项中, 选出最佳答案。
We are used to the idea of aging ourselves. We are so used to this that it comes as a surprise to find that there may be some animals that do not age. Sea anemones (海葵) are an example. Some have been kept for nearly a century without showing any signs of losing vigor (活力). Some sea worms can even "grow backwards". If starved and kept in the dark, they get smaller. They finally end as a ball of cells, looking rather like the egg from which they come. Under favorable conditions the ball will turn back to a worm and start growing again. One could probably keep them growing and "un-growing" indefinitely.
(1) Some sea worms get smaller when they ___________.
[ ]
A. lose their breath
B. lose weight
C. suffer from cold
D. suffer from hunger and do not see any light
(2) According to the passage, some sea animals ___________.
[ ]
A. are afraid of light
B. die when they become a ball of cells
C. do not grow old
D. do not eat food at all
查看习题详情和答案>>
|