题目内容

【题目】下图为“沿106.5°E我国局部地形剖面图”，回答下列各题。

【1】图中①地形区为

A．黄淮海平原 B．四川盆地

C．江汉平原 D．黄土高原

【2】关于③地形区的特点，描述正确的是

A．冰川广布，平坦开阔

B．喀斯特地貌广布，地表崎岖

C．千沟万壑，支离破碎

D．远看是山，近看成川

【3】有关②地区的叙述，正确的是

A.土壤盐碱化严重，多中、低产田

B.地势平坦，草原辽阔

C.水土流失严重，小流域宜打坝淤地

D.冬季温暖，河网密布，水土流失严重

【答案】

【1】D

【2】B

【3】D

【解析】

试题分析：

【1】图示为沿106.5°E我国局部地形剖面图，图中①地形区位于秦岭北侧，是黄土高原，D对。黄淮海平原位于115°E以东地区，A错。四川盆地位于秦岭以南，B错。江汉平原 位于110°E以东，C错。

【2】根据经度和地形剖面图，③地形区位于四川盆地南侧，是云贵高原，喀斯特地貌广布，地表崎岖，B对。纬度低，海拔较低，没有永久冰川分布，地形崎岖，A错。千沟万壑，支离破碎是黄土高原的景观，C错。远看是山，近看成川是青藏高原的写照，D错。

【3】结合前面分析，②地区是四川盆地，由于四面高山环绕，盆地内冬季温暖，河网密布，水土流失严重，D对。土壤肥沃，没有盐碱化问题，A错。盆地内部是有主要商品粮基础，不是牧区景观，B错。 水土流失严重，小流域宜打坝淤地是黄土高原的特征。

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California Condor’s Shocking Recovery

California condors are North America’s largest birds, with wing-length of up to 3 meters. In the 1980s, electrical lines and lead poisoning(铅中毒) nearly drove them to dying out. Now, electric shock training and medical treatment are helping to rescue these big birds.

In the late 1980s, the last few condors were taken from the wild, and there are now more than 150 flying over California and nearby Arizona, Utah and Baja in Mexico.

Electrical lines have been killing them off. “As they go in to rest for the night, they just don’t see the power lines,” says Bruce Rideout of San Diego Zoo. Their wings can bridge the gap between lines, resulting in electrocution(电死) if they touch two lines at once.

So scientists have come up with a shocking idea. Tall poles, placed in large training areas, teach the birds to stay clear of electrical lines by giving them a painful but undeadly electric shock. Before the training was introduced, 66% of set-freed condors died of electrocution. This has now dropped to 18%.

Lead poisonous has proved more difficult to deal with. When condors eat dead bodies of other animals containing lead, they absorb large quantities of lead. This affects their nervous systems and ability to produce baby birds, and can lead to kidney(肾) failures and death. So condors with high levels of lead are sent to Los Angeles Zoo, where they are treated with calcium EDTA, a chemical that removes lead from the blood over several days. This work is starting to pay off. The annual death rate for adult condors has dropped from 38% in 2000 to 5.4% in 2011.

Rideout’s team thinks that the California condors’ average survival time in the wild is now just under eight years. “Although these measures are not effective forever, they are vital for now,” he says. “They are truly good birds that are worth every effort we put into recovering them. ”

【1】California condors attract researchers’ interest because they .

A.are active at night

B.had to be bred in the wild

C.are found on in California

D.almost died out in the 1980s

【2】Researchers have found electrical lines are.

A.blocking condors’ journey home

B. big killers of Califorbnia condoras

C. rest places for condors at night

D. used to keep condors away

【3】According to Paraghaph 5 ,lead poisoning.

A.makes condors too nervous to fly

B. has little effect on condors’ kidneys

C. can hardly be gotten rid of form condors’ blood

D. makes it different for condors to produce baby birds

【4】The passage shows that .

A.the average survival time of condors is satisfactory

B.Rideout’s research interest lies in electric engineering

C.the efforts to protect condors have brought good results

D.researchers have found the final answers to the problem

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