Even in fresh water sharks hunt and
kill. The Thresher shark, capable of lifting a small boat out of the water, has
been sighted a mile inland on the Fowey River in Corn-wall. Killer sharks swim
rivers to reach Lake Nicaragua in Central America; they average one human victim
each year. Sewage and garbage attract sharks inland. When floods carry garbage to the rivers they provide a rich diet which sometimes stimulates an epidemic of shark attacks. Warm water generally provides shark food, and a rich diet inflames the shark’s aggression. In British waters sharks usually swim peacefully between ten and twenty miles off- shore where warm water currents fatten mackerel and pilchards for their food. But the shark is terrifyingly unpredictable. One seaman was severely mauled as far north as Wick in Scotland. Small boats have been att A. salt water B. fresh water C. warm water D. deep water [判断题]Warm water can’t cool us, But cold water can.
[判断题]Warm water can’t cool us, but cold water can.
[填空题]Two of the results of lacking water mentioned in the passage are ______.
[填空题]If water doesn’t flow into the washing machine, we should check whether______ first.
[填空题]Please get me some hot water from the t().
[单项选择]
W: I thought your eyesight was excellent even in the dark. Why don’t you turn on the light A. It was too dark. B. His eyesight is not so good. C. The man doesn’t want to. D. He can’t find the switch. 我来回答: 提交
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