2 The extent of the disaster in an earthquake depends on many factors. If you carefully build a toy house with an Erector set, it will still stand no matter how much you shake the table. But if you build a toy house with a pack of cards, a slight shake of the table will make it fall. An earthquake in Agadir, Morocco, was not strong enough to be recorded on distant instruments, but it completely destroyed the city. Many stronger earthquakes have done comparatively little damage. If a building is well constructed and built on solid ground, it will resist an earthquake. Most deaths in earthquakes have been due to faulty building construction or poor building sites. A third and very serious factor is panic. When people rush out into narrow streets, more deaths will result.
3 The United Nations has played an important part in reducing the damage done by earthquakes. It has sent a team of experts to all countries known to be affected by earthquakes. Working with local geologists and engineers, the experts have studied the nature of the ground and the type of most practical building code for the local area. If followed, these suggestions will make disastrous earthquakes almost a thing of the past.
4 There is one type of earthquake disaster that little can be done about. This is the disaster caused by seismic sea waves, or tsunamis. (These are often called tidal waves, but the name is incorrect. They have nothing to do with tides. ) In certain areas, earthquakes take place beneath the sea. These submarine earthquakes sometimes give rise to seismic sea waves. The waves are not noticeable out at sea because of their long wave length. But when they roll into harbours, they pile up into walls of water 6 to 60 feet high. The Japanese call them "tsunamis", meaning "harbour waves", because they reach a sizable height only in harbours.
5 Tsunamis travel fairly slowly, at speeds up to 500 miles an hour. An adequate warning system is in use to warn all shores likely to be reached by the waves. But this only enables people to leave the threatened shores for higher ground. There is no way to stop the oncoming wave.
Which of the following CANNOT be concluded from the passage?
A.The number of earthquakes is closely related to depth.
B.Roughly the same number of earthquakes occur each year.
C.Earthquakes are impossible at depths over 460 miles.
D.Earthquakes are most likely to occur near the surfaces.
第3题
为防止注射时针头折断不能取出,注射时针头保留在体外的长度为
A、0.5cm
B、1.0cm
C、1.5cm
D、2.0cm
E、3.0cm
第4题
为避免在局麻时产生血肿,以下的预防措施中,错误的是
A.不能用有倒钩的针头进行注射
B.避免反复多方向穿刺
C.深部注射时,防止进针过深
D.尽量使用不含肾上腺素的麻药
E.注射时缓慢推注
第5题
为避免在局麻时产生血肿,以下的预防措施中,错误的是
A.不能用有倒钩的针头进行注射
B.避免反复多方向穿刺
C.深部注射时,防止进针过深
D.尽量使用不含肾上腺素的麻药
E.注射时缓慢推注
第6题
为避免在局麻时产生血肿,以下的预防措施中,错误的是
A.不能用有倒钩的针头进行注射
B.避免反复多方向穿刺
C.深部注射时,防止进针过深
D.尽量使用不含肾上腺素的麻药
E.注射时缓慢推注
第7题
为避免在局麻时产生血肿,以下的预防措施中,错误的是
A.不能用有倒钩的针头进行注射
B.避免反复多方向穿刺
C.深部注射时,防止进针过深
D.尽量使用不含肾上腺素的麻药
E.注射时缓慢推注
第9题
局麻过程中为防止医源性感染,错误的处理为
A、注射点拭干后用2%碘酊消毒
B、注射过程中防止注射针头被污染
C、使用一次性针头
D、防止局麻药被污染
E、术前术后3天应用抗菌药
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