欧美日韩黄网欧美日韩日B片|二区无码视频网站|欧美AAAA小视频|久久99爱视频播放|日本久久成人免费视频|性交黄色毛片特黄色性交毛片|91久久伊人日韩插穴|国产三级A片电影网站|亚州无码成人激情视频|国产又黄又粗又猛又爽的

The Ring of Fire covers 4,000 km around the edge of the Pacific Ocean．It includes the countries of Japan，Indonesia and the Philippines．More earthquakes and volcanoes occur in this area than anywhere else in the world．The name Ring of Fire refers to areas below the earth's surface．These areas move suddenly and often cause earthquakes and create volcanoes．

Many areas of Asia，such as the Philippines，Japan，and Indonesia, sometime experience earthquakes and volcanoes．There are occasionally landslides(泥石流)，mudslides，and tidal waves as a result．Fortunately, these natural disasters do not happen very often．

Southern China is about 600 km away from the Ring of Fire．Sometimes, people in this region feel earthquakes too．The worst earthquake felt in southern China was in 1918 in Shantou．It measured 7.3 on the Richter scale．Any earthquake of 6 or more on the Richter scale is very dangerous to people．

People in Hong Kong sometimes experience the effects of earthquakes and volcanoes．In September 1994，for example，the strongest earthquake to hit Hong Kong for 76 years shook buildings and scared thousands of residents．Frightened workers and families ran out of their offices and homes．The earthquake measured 6.5 on the Richter seal．

It is difficult to predict when an earthquake will occur In countries within the Ring of Fire, buildings must be very strong because the effects of earthquakes on buildings are terrible．

In June 1991, Mt Pinatubo in the Philippines erupted．Many people were killed and the area surrounding the volcano was badly damaged．Hot ash and liquid rock from the volcano forced people to leave the area．They only returned many months later．The ash spread over a large area．Even people in the Guangdong region of southern China saw ash in the air．

69．The Ring of Fire is              ．

    A．a(chǎn)bout 4,000 km from China

    B a volcano in the Philippines

    C．a(chǎn) Region where there are many earthquakes and volcanoes

    D．a(chǎn) fire below the Earth's surface

70．Many Asian countries              ．

    A．a(chǎn)re outside the Ring of Fire    B．never experience natural disasters

    C．experience earthquakes only  D．experience earthquakes and volcanoes

71．Hong Kong                 ．

    A．never experienced earthquakes

    B．is at the center of the Ring of Fire

    C．often experiences very strong earthquakes

    D．has experienced a few earthquakes

72．Earthquakes          ．

    A．never cause much damage

    B．a(chǎn)re easy of predict

    C．occur suddenly and are difficult to predict

    D．a(chǎn)re usually accompanied by strong winds