Before the training was introduced, 66% of set-freed condors died of electrocution.

2016年高考英语北京卷 阅读理解 阅读C 原文

California condors are north America's largest birds, with wind-length of up to 3 meters.

2016年高考英语北京卷 阅读理解 阅读C 原文

California condors attract researchers' interest because they almost died out in the 1980s.

2016年高考英语北京卷 阅读理解 阅读C 题设

California condors attract researchers' interest because they had to be bred in the wild.

2016年高考英语北京卷 阅读理解 阅读C 选项

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.

2016年高考英语北京卷 阅读理解 阅读C 原文

Researchers have found electrical lines are big killers of California condors.

2016年高考英语北京卷 阅读理解 阅读C 题设

Rideout's team thinks that the California condors' average survival time in the wild is now just under eight years.

2016年高考英语北京卷 阅读理解 阅读C 原文

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.

2016年高考英语北京卷 阅读理解 阅读C 原文

The annual death rate for adult condors has dropped from 38% in 2000 to 5%.

2016年高考英语北京卷 阅读理解 阅读C 原文

The average survival time of condors is satisfactory.

2016年高考英语北京卷 阅读理解 阅读C 选项

The passage shows that the efforts to protect condors have brought good results.

2016年高考英语北京卷 阅读理解 阅读C 题设

When condors eat dead bodies of other animals containing lead, they absorb large quantities of lead.

2016年高考英语北京卷 阅读理解 阅读C 原文