The government had succeeded in encouraging thousands of rescue workers to pump out water and search for the miners. After that, the water level dropped low enough for rescue workers to enter the shaft.

　　It was rare good news in China's dangerous coal-mining industry, the deadliest in the world with thousands killed every year in floods, explosions, collapses and other accidents. Shanxi Province is the heartland of that industry.

　　Strong demand for energy and not strict safety standards have made China's mines often deadly places to work, despite a government drive to clamp down on (对……进行压制或取缔) small, unsafe operations where most accidents occur.

　　Workers are tempted into (被诱惑去) the mines by wages that can be much higher than for many other jobs open to blue-collar workers and rural migrants.

　　China has consolidated (合并) or taken over many private mines, which has helped cut accidents. According to official statistics, the number of people killed in Chinese coal mines dropped to 2,631 in 2009, an average of seven a day, from 3,215 in 2008. But the deadliest accidents are not limited to private firms.

　　81. According to the second paragraph, what caused the serious accident?

　　(no more than 6 words)

　　82. How did the rescuers manage to send down oxygen and bags of glucose into the pit? (no more than 5 words)

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