A．A boy's singing saved his sister's life.

　　B．The little girl is well enough to go home.

　　C．Michael's little sister is born with a serious disease.

　　D．No children are allowed to enter the intensive care unit.

　　B

　　(2013·江苏五市高三第三次调研)Giant landslides (山崩) have a seismic (地震的) fingerprint that allows researchers to estimate their size, duration, and even how far they travel across the landscape, new research reveals. The finding may be particularly useful in identifying landslides that occur in steep, remote areas where few people live — not because of their immediate effects, but because such slumps (滑坡) can block rivers and impound lakes that could later destroy the natural dams and threaten populated areas downstream.

　　Seismometers and other such instruments record ground motions occurring at all frequencies (频率), but seismologists typically pay attention to only those in ranges where the signals of earthquakes exist. The first seismic waves caused by quakes and explosions are sharp and distinct, says Göran Ekström, a seismologist in Palisades, New York. But the low­frequency waves caused by giant landslides are occasionally hidden in the mix of seismic vibrations (震动) booming through Earth's crust, too.

　　Of the 29 largest known landslides worldwide from 1980 through 2012, ground motions from the 27 largest

【【三维设计】2017版（江苏专用）二轮复习练习：必修3 Unit 3《Back to the past》单元检测（含解析）】相关文章：

★ 2017届高考英语二轮复习大题冲关秘籍短文改错：名校模拟（含解析）

★ 【三维设计】2017届高考英语（江苏专用）二轮复习高考单词5大记忆法课件：1.分类记忆法

★ 2017届高考英语二轮复习大题冲关秘籍短文改错：解题策略（含解析）

★ 【三维设计】2017届高考英语（江苏专用）二轮复习课件：必修3 Unit 2《Language》

★ 【三维设计】2017届高考英语（江苏专用）二轮复习课件：必修2 Unit 3《Amazing people》

★ 2017届高考英语二轮复习大题冲关秘籍完形填空之记叙文：创新押题（含解析）

★ 2017届高考英语二轮复习大题冲关秘籍完形填空之夹叙夹议文：创新押题（含解析）

★ 2017届高考英语二轮复习大题冲关秘籍之日常交际用语大全：高考英语日常交际用语必备习语大全（上）（含解析）

★ 2017届高考英语二轮复习大题冲关秘籍语法填空：命题分析（含解析）

★ 【三维设计】2017版（江苏专用）二轮复习练习：必修3 Unit 3《Back to the past》课时跟踪检测A卷（含解析）