The divers （潜水员)hoped to （）some of the secrets of the seabed.

A.unlock (揭开)

B.lock

C.unfold

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更多“The divers （潜水员)hoped to （）som…”相关的问题

第1题

Scientists used to explore【31】the surface of the ocean. Now they【32】below the surface, too

. They want to know about the ocean water and the【33】and animal life【34】in the ocean.

In 1934 the scientist William Beebe dived 3 , 000 feet below the surface in a hollow steel ball. In 1935 Auguste Piccard dived 10, 330 feet. In 1960 his son Jean dived to a【35】of 35, 800 feet.

All these early dives were deep. But the divers could not stay down for very long. They had to【36】the surface after a few seconds. Scientists needed to stay down longer to study life below the surface.【37】, they succeeded. Cousteau, a Frenchman, was able to【38】down to a depth of【36】feet for one month and to a depth of 90 feet for a week.

Now scientists are developing even【39】equipment. With this new equipment, men can stay【40】the surface for days or【41】weeks. In 1962 Consteau【42】a research station 35 feet below the surface. Then in 1964 he set up another station on the ocean floor of the Red Sea. This was the first undersea station to operate【43】help from the surface.

Many countries are now studying undersea【44】. The Soviet Union has an undersea laboratory in the Crimean Sea. The United States has a laboratory 50 feet【45】on the ocean floor【46】the Virgin Islands. In 1970 five men lived there for two weeks. Then a【47】of five women scientists stayed in the laboratory.【48】came other teams of men. All were there to explore the ocean depths and【49】plans for the use of its resources. Scientists hope to find enough【50】, vegetable, and animal wealth there to provide food for the whole world.

(31)

A．in

B．to

C．on

D．under

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第2题

The deeper divers goes down in the sea,A.the wanner the sea becomesB.the colder they find

The deeper divers goes down in the sea,

A.the wanner the sea becomes

B.the colder they find the sea is

C.the less the water above presses down

D.the heavier their clothes must be

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第3题

TheCraigheadCavernshavebeenknown________.A.throughhistoryB.sincethetimeoftheIndiannationsC

The Craighead Caverns have been known ________. A. through history B. since the time of the Indian nations C. since 1905D. since divers explored them

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第4题

根据以下内容，回答下列各题。 In the old days, divers used to go down into the sea looking f

or ships that had sunk, because they hoped to find gold and jewels．Now divers still search for valuable things in sunken ships, but they also try to bring to the surface the ships themselves, or parts of them．The value of different kinds of metals has increased greatly over the last twenty or thirty years and even though a ship has been under the sea for many years, it may be worth a great deal． One famous sunken ship is the “Lusitania”, which sank off the southern coast of Ireland in 1915 with a loss of nearly, 1,500 lives．It has four huge propellers made of an expensive metal．Today each of those propellers is worth $ 300,000 or more．The ship lying on the sea-bed has been brought by a man called John Light．He paid about $ 1,200,000 for the whole ship．He hopes to bring up those propellers and sell them．He also hopes to sell other parts of the ship, when he has brought them to the surface, for about $ 600,000． Divers today try to bring to the surface _______．

A.gold and jewels

B.parts of ships

C.whole ships

D.all of the above

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第5题

潜水员在水下工作时必须遵守哪些规定?

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第6题

潜水员在进行水下闸门作业时，必须在闸门以后下水，在闸门()之前出水，并有可靠措施，保证潜水员在水下不会闸门。

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第7题