It’s perhaps the world’s most famous underwater attraction, immortalized in film and in legend: the Titanic. But now experts say the ocean liner, once a wonder of the high seas, is falling to pieces.
Capt. Alfred McLaren, the scientist who in July led the most recent expedition to the ship’s underwater grave, said his team saw clear signs of the wreck’s accelerating decay. There was damage likely caused by rust and sea life, and the captain’s cabin had collapsed.
"I was absolutely astonished," McLaren said.
Worse still, the fallen mast that crushed the ship’s deck is believed by many to be the result of an unapproved salvage operation. "It was almost depressing to see how quickly she was deteriorating," McLaren says. "I would be really surprised if there’s very much standing up from the bottom, two decades from now."
Ed Kamuda, who runs the Titanic Historical Society in Springf
A. vague
B. controllable
C. promising
D. discouraging
It’s perhaps the world’s most famous underwater attraction, immortalized in film and in legend: the Titanic. But now experts say the ocean liner, once a wonder of the high seas, is falling to pieces.
Capt. Alfred McLaren, the scientist who in July led the most recent expedition to the ship’s underwater grave, said his team saw clear signs of the wreck’s accelerating decay. There was damage likely caused by rust and sea life, and the captain’s cabin had collapsed.
"I was absolutely astonished," McLaren said.
Worse still, the fallen mast that crushed the ship’s deck is believed by many to be the result of an unapproved salvage operation. "It was almost depressing to see how quickly she was deteriorating," McLaren says. "I would be really surprised if there’s very much standing up from the bottom, two decades from now."
Ed Kamuda, who runs the Titanic Historical Society in Springf
A. Mother Nature
B. human nature
C. thrill seekers
D. adventure tourists
| Perhaps the most familiar plant
movement belongs to one species of mimosa called the sensitive plant. Within
seconds, it can lower its leaves and make its tiny leaflets close up like
folding chairs. This movement is thought to be initiated by electrical impulses
remarkably similar to nerve signals in animals. But without the animals’
sophisticated motion machinery, the mimosa has had to be creative in devising a
way to move. For motion, the plant depends on tiny, bulb-shaped organs located at the base of each leaf stalk and leaflet. Called pulvini, these organs hold the plant parts in place. When the mimosa is stimulated—say, by a crawling insect or a sudden change in temperature—an electrical impulse sweeps through the plant. This causes potassium and then water to be shifted from certain cells in the pulvini to others, quickly turning one side of the o A. geographical distribution of plant and animal species B. location and purpose of the pulvini C. appearance of the mimosa D. process that causes movement in the mimosa 我来回答: 提交
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