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【简答题】

The devastation of Typhoon Morakot over Taiwan and eastern China is a reminder that the northwest Pacific is the most erous region in the world for tropical storms.The worst of these are typhoons, which are the same as hurricanes in the Atlantic and eastern Pacific, or cyclones in the Indian Ocean and Australia.They all have winds of more than 118km/h (73mph) spinning around a central core. These storms start off as a mass of thunderstorms in the tropics outside the Equator.Given the right conditions, they form a bigger and more organised storm and feed off warm seas at more than 26.5C (80F) to get the fuel that they need to become a fully-fledged(羽毛丰满的) typhoon, hurricane or cyclone.Each storm is like a heat engine, extracting heat from the warm, humid air over the sea and turning it into phenomenal amounts of energy — equivalent to about 200 times the entire world’s electrical generating capacity.But warm, moist air is not enough — these storms also need slack winds aloft, because strong high-altitude winds can rip off the top of the storm clouds and send the entire storm tumbling(翻跟头). The damage from tropical storms often comes from their winds, or the storm surges from the sea as the winds pile up water into a huge battering ram(冲击夯) that floods coastlines.But the devastation from Typhoon Morakot came from its unbelievable rainfall — about a year’s average rain in some places — that set off landslides and mudslides. 45.According to the first paragraph, the common point among typhoons,hurricanes and cyclones is _______. A.that they all come from the oceans B.that they all have winds of over 118km/h spinning around a central core C.that they all cause great damage D.that they all can generate electricity 46.Which of the following is the best title of this passage? A.Typhoon Morakat devestates Taiwan and eastern China B.How is the typhoon formed? C.Typhoon Morakot was how to devestate the areas it travelled D.How terrible is Typhoon Morakat! 47.The devastation from Typhoon Morakot is mainly from ______. A.its wind                  B.its rainfall C.landslides and mudslides      D.the storm 48.It can be inferred from the passage that ______. A.Taiwan is off the northwest Pacific B.the damage from tropical storms often comes from their winds C.tropical storms often happen D.tropical storms only need warm, moist air

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参考答案:
举一反三

【多选题】下列选项中,关于振动冲击夯的操作要点,叙述正确的有( )。

A.
正常作业时,应用力往下压手把,加大夯实力度
B.
作业时应正确掌握夯机,不得倾斜,要紧握手把,控制夯机前进速度
C.
电动冲击夯在接通电源启动后,应检查电动机旋转方向,有错误时应倒换相线
D.
在需要增加密实度的地方,可通过手把控制夯机在原地反复夯实
E.
在较松的填料上作业或上坡时,可将手把稍向下压,并应能增加夯机前进速度

【单选题】内燃机冲击夯启动后,控制油门的方法是()。

A.
启动时用最大油门
B.
启动后逐渐加大油门
C.
先大油门再减油
D.
先大油门,减油再加油
相关题目:
【多选题】下列选项中,关于振动冲击夯的操作要点,叙述正确的有( )。
A.
正常作业时,应用力往下压手把,加大夯实力度
B.
作业时应正确掌握夯机,不得倾斜,要紧握手把,控制夯机前进速度
C.
电动冲击夯在接通电源启动后,应检查电动机旋转方向,有错误时应倒换相线
D.
在需要增加密实度的地方,可通过手把控制夯机在原地反复夯实
E.
在较松的填料上作业或上坡时,可将手把稍向下压,并应能增加夯机前进速度
【单选题】内燃机冲击夯启动后,控制油门的方法是()。
A.
启动时用最大油门
B.
启动后逐渐加大油门
C.
先大油门再减油
D.
先大油门,减油再加油
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