问题 单项选择题

炮眼直径和深度分别小于70mm和5m的爆破方法是()。

A.药壶炮

B.钢钎炮

C.猫洞炮

D.洞室炮

答案

参考答案:B

解析:本题考点是综合爆破施工技术中各种爆破方法的概念。钢钎炮通常指炮眼直径和深度分别小于70mm和5m的爆破方法。药壶炮是指在深2.5~3.0m以上的炮眼底部用小量炸药经一次或多次烘膛,使眼底成葫芦形,将炸药集中装入药壶中进行爆破。猫洞炮系指炮洞直径为0.2~0.5m,洞穴咸水平或略有倾斜(台眼),深度小于5m,用集中药锯炮洞中进行爆炸的一种方法。洞室炮主要包括药壶炮和猫洞炮。选项A、C、D是错误的。本题的正确项只能是"B.钢钎炮"。

阅读理解

第三部分阅读理解(共两节,满分40分)

第一节:阅读理解(共20小题,每小题2分,满分40分)

阅读下列短文,从每题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。

A  teenage girl is fighting for her life today after being struck by lightning as severe thunderstorms swept across Britain. The girl was one of four teenage girls from London who were hit by lightning in the Parade Ground area of Hyde Park during a storm.  Earlier, Joseph Wharton, 14, died as he was struck by lightning while camping in his friend’s backyard in the West Midlands.

A spokesman for Scotland Yard said the girl remained in serious condition at St. Mary’s Hospital in Paddington. She had stooped breathing by the time the first paramedic arrived on the scene just two minutes after the strike at 5:40 p.m. yesterday.

The other three girls hit by the bolt all had injuries, and were taken to University College Hospital. Their conditions were not serious, the spokesman added. The strike lifted the girls into the air and then dropped them to the ground, a witness reported.

A spokesman for the London Ambulance Service said paramedics risked their lives to treat the girls. “The storm was still overhead and lightning was still coming down while they were treating the patients,” he said. “All staff involved acted very professionally in providing fast treatment to these patients in very difficult circumstances.” Scotland Yard said the incident was being looked into by officers from the Royal Parks’Operational Command Unit.

Joseph Wharton of Byland Way, Bloxwich, was hit during the extended thunderstorm which struck the region yesterday morning. He was pronounced dead at Walsall Manor Hospital.

He had been sleeping in a tent while staying with school friend Michael Lees at a house on nearby Cresswell Crescent.                            

West Midlands Ambulance Service said paramedics were called at 7:50 a.m. and unsuccessful attempts were made to revive the sports-mad teenager. A spokesman for the Royal Society for the Prevention of Accidents said four or five people die each year as a result of lightning strikes in the UK.

1.All four girls  _______________.

A  were killed by the lightning             B  were seriously injured

C  were being treated at the same hospital    D  were lifted up and dropped to the ground

2  The underlined word “bolt” probably means  “ ______________”

A  thunder    B  rain     C  storm     D  lightning

3  Which of the following is TRUE according to the passage?

A  The boy was killed after the four girls had been hit.

B  The paramedics began to treat the girls after taking them to the hospital.

C  First-aid was given to the girls during the storm.

D  The boy was hit by lightning in the Parade Ground area of Hyde Park.

4  It can be inferred from the passage that _______.

A  many British people die from lightning strikes every year

B  the writer blames the government for the accident

C  the paramedics could also have been hit by lighting while aiding the girls.

D  Joseph had been playing in the open air before the strike

5  This passage is probably taken from a _______.

A  magazine   B  newspaper   C  science fiction     D  weather report

单项选择题