A．search

　　B．resources

　　C．research

　　D．experience

　　解析：句意：科学家在能够理解和找到一个治愈办法之前需要做大量的调查和实验，do research做调查，为固定搭配。

　　答案：C

　　Ⅳ.阅读理解

　　A

　　Thousands of dead red­winged blackbirds fell from the sky in an Arkansas town on New Year's Eve after massive injuries，tests by Arkansas officials concluded on Monday.Some 5,000 birds mysteriously fell from the sky in Beebe，Arkansas after dark on New Year's Eve.“The birds suffered from acute physical injuries leading to internal hemorrhage (出血) and death.There was no sign of infectious disease，”the Arkansas Game and Fish Commission said in a statement.The birds were otherwise healthy，it said.

　　One theory is that birds were frightened by New Year's fireworks and flew into buildings or other objects.“Loud noises were reported shortly before the birds began to fall from the sky，”the statement said，adding that blackbirds have poor night vision and seldom fly at night.

　　Another theory was that severe weather such as lightning accounted for the loud noises but this was discounted because the violent weather had already left the area.“We're leaning more toward a stress event，”said the Arkansas Game and Fish Commission spokesman Keith Stephens.

【高考一轮复习学案人教版必修三《Unit 2 Healthy eating》】相关文章：

★ 2014届高考英语一轮复习课时作业(二十三)必修4Module 5《A Trip Along the Three Gorges》（外研版）

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修2 unit5《Music》

★ 2014届高考英语一轮复习课时作业(三十五)选修6Module 5《Cloning》（外研版）

★ 【北京专用】2014届高考英语一轮复习方案课时作业：必修5 Unit 1 Great scientists

★ 【浙江专用】2014届高考英语一轮复习课时作业(十三)必修3Unit 3《The Million Pound Bank Note》

★ 2014届高考英语一轮复习课时作业(二十七)必修5Module 3《Adventure in Literature and the Cinema》（外研版）

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修2 unit2《The Olympic Games》

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修3 unit5《Canada》

★ 【浙江专用】2014届高考英语一轮复习课时作业(二十九)选修6Unit 4《Global warming》

★ 【浙江专用】2014届高考英语一轮复习课时作业(九)必修2Unit 4《Wildlife protection》