Why do hoatzins collect together in smaller groups when the rainy season comes?
A.To find more food.
B.To protect themselves better.
C.To keep themselves warm.
D.To produce their young.
第1题:
It is that feeling of belonging, of love and security ____ comes from living together, helping and sharing.
A、which
B、what
C、who
D、that
第2题:
Why does the exporter usually insist on the buyer establishing a credit in his favor before shipment is unloaded?
A.To collect the proceeds.
B.To draw drafts.
C.To revoke the contract.
D.To reduce the possible risk.
第3题:
— _______________? — That’s a good idea.
A、When can you write the invitations
B、What do you think of the invitations
C、Why don’t you write the invitations now
D、Why not you write the invitations now
第4题:
A.to confine network instability to single areas of the network.
B.to reduce the complexity of router configuration
C.to speed up convergence
D.to lower costs by replacing routers with distribution layer switches
E.to decrease latency by increasing bandwidth
F.to reduce routing overhead
第5题:
C
Along the river banks of the Amazon and the Orinoco there lives a bird that swims before it can fly, flies like a fat chicken, eats green leaves, has the stomach of a cow and has claws (爪) on its wings when young. They build their homes about 4.6m above the river, an important feature (特征) for the safety of the young. It is called the hoatzin. In appearance, the birds of both sexes look very much alike with brown on the back and cream and red on the underside. The head is small, with a large set of feathers on the top, bright red eyes, and blue skin. Its nearest relatives are the common birds, cuckoos. Its most striking feature, though, is only found in the young. Baby hoatzins have a claw on the leading edge of each wing and another at the end of each wing tip. Using these four claws, together with the beak (喙), they can climb about in the bushes, looking very much like primitive birds must have done. When the young hoatzins have learned to fly, they lose their claws. During the drier months between December and March hoatzins fly about the forest in groups of 20 to 30 birds, but in April, when the rainy season begins, they collect together in smaller living units of two to seven birds for producing purposes.
63.What is the text mainly about?
A.Hoatzins in dry and rainy seasons.
B.The relatives and enemies of hoatzins.
C.Primitive birds and hoatzins of the Amazon.
D.The appearance and living habits of hoatzins.
第6题:
第7题:
Which mechanism does OSPFv3 use when the router LSA is too big to be sent out?()
第8题:
第9题:
第10题:
第11题:
It relies on IPv6 to do the fragmenting.
It splits the LS Update packet into smaller packets.
It splits the LSA into smaller router LSA packets.
It produces an error.
第12题:
第13题:
A.to play piano
B.play piano
C.do you play the piano
D.play the piano
第14题:
A.to reduce
B.reduce
C.reducing
D.reduced
第15题:
The main reason why people fail to act when they stay together is that______.
A) they are afraid of emergencies
B) they are reluctant to get themselves involved
C) others will act if they themselves hesitate
D) they do not feel any direct responsibility for those who need help
第16题:
健康教育计划总体目标的三个"W"是指
A、when,why,which
B、who,what,when
C、when,why,what
D、when,where,what
E、who,what,why
第17题:
第18题:
When the good sare ready,the shipping agent will()and()them to the docks.
第19题:
Nicknamed are easy to remember.
Americans are an informal people
Nicknames help to create an informed casual relationship
Nicknames are easy to use in daily life
第20题:
Receiving the person who comes on board to do their business.
Receiving the persons who comes on board to visit.
Receiving the persons who comes on board to do the job.
Receiving the persons who comes on board to look around the ship.
第21题:
Bosun, why do we open hatch covers?
Officer, why do we open hatch covers?
Bosun, why do we close hatch covers?
Bosun, why do we open hatches?
第22题:
第23题:
itinerant
indigenous
subdued
nocturnal
arboreal