Vessels transiting the Canal must have their gangways and derricks ________A.readjustedB.r

A. inbound traffic transiting the router

B. outbound traffic transiting the router

C. traffic destined to the Routing Engine

D. traffic destined to the interface address on which the filter is applied

Get the searchlight ______ for transiting the canal at night．

A.turned off

B.already

C.almost

D.ready

Get searchlight______for transiting the canal at night．

A.on

B.already

C.Almost

D.ready

On which vessels is GMDSS required？______.

A.All vessels capable of international voyages

B.Vessels operating outside of the range of VHF coastal radio stations

C.SOLAS Convention ships of 300 gross tonnage or more

D.Coastal vessels of less than 300 gross tons

A NVOCC usually operates vessels to provide sea transportation.( )

A.vessels

B.wrecks

C.uniforms

D.tissues

Biologists have known for some time that giraffes solve this problem by having 【C3】______ high blood pressure, about 【C4】______ that of human beings. But an international team of biologists began to 【C5】______ about this. If giraffes have such high blood pressure, they should have a 【C6】______ problem with swelling in their legs and feet. Why don't giraffes have swollen feet？

Giraffes should have 【C7】______ problem, too. Every time they bend heads 【C8】______ to drink, the blood should 【C9】______ to their heads and have a hard time 【C10】______ back up (when the head is down) to the heart. How come giraffes don't black out when they drink？

The answer to the 【C11】______ feet problem, the researchers found, is that giraffes have 【C12】______ the researchers call a "natural anti-gravity suit". It 【C13】______ out that the skin and other 【C14】______ in their legs and feet are 【C15】______ stiffer and tougher than those of other 【C16】______ . As a result, the blood vessels in the leg cannot swell.

Therefore, the blood has nowhere to go but back to the heart. What about blood rushing to the head 【C17】______ the giraffe bends down to drink？ The researchers found that the giraffe's jugular vein, which 【C18】______ blood from the head back to the heart, has lots of one-way valves in it. In the giraffe's neck, there are lots of muscles that flex and relax repeatedly as the animal moves its head and sucks 【C19】______ drinking water. By squeezing the valved jugular vein, they 【C20】______ blood moving back to the heart even while the animal is drinking.

【C1】

A．bring

B．produce

C．transfer

D．pump

The lifesaving equipment on all vessels shall be ______．

A.inspected weekly

B.stowed in locked compartments

C.readily accessible

D.tested yearly