下列各组的名称与化学式不相符的是( ) A.N2O5(五氧化二氮) B.AlCl

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问题:

下列各组的名称与化学式不相符的是(  )

A.N2O5(五氧化二氮)

B.AlCl3(氯化铝)

C.CaCO3(三氧碳化钙)

D.MnO2(二氧化锰)

考点:化学式的写法和意义化合价的求法
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比较分析工艺美术运动和Bauhaus的主要思想、巨大影响及其历史局限性。

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No one knows yet the accurate number of lives which have been lost in this terrible fire .But reports suggest that it is more than one hundred .

A wall of flames fifty feet high and at least one hundred and fifty miles wide is now racing towards the forests and rich farmlands of southern Victoria . Towns less than one hundred miles from Melbourne will be in danger unless the wind changes . People are rushing excitedly into the streets . The police have warned them not to see the fire but many people are doing so .

The cause of the fire is unknown . No rain has fallen in this part of Australia for three months , and the hot , north-west wind from the great central desert is blowing at more than thirty miles an hour .

The firefighters are travelling to the fire by road , rail and air . But it is not easy to get there . Flames and fallen trees have cut off or blocked roads and railway lines . The thick smoke often prevents them from finding the air strips (飞机跑道).

It is said that the fire has brought the greater danger to the country since the Second World War .

小题1:By the time the article was written , the fire        .

A.had just broken out

B.had been put out

C.was spreading violently

D.was coming to an end小题2:The writer wrote this article mainly to tell people        .

A.the fire was terrible and dangerous

B.it was impossible to put out the fire

C.more than one hundred people died of the fire

D.to join in the fight against the fire小题3:In the 4th paragraph , the writer suggested that        .

A.the fire would soon be controlled by the firefighters

B.it would be very difficult to put out the fire

C.the government was paying great attention to the fire

D.the fire had caused great losses and the airport was in ganger小题4:The underlined word “ accurate” in the first sentence has the same meaning as        .

A.recent

B.whole

C.rough

D.exact

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根据我国《建筑施工场界噪声限值》的规定,在结构工程施工阶段,混凝土搅拌机昼间施工的噪声限值为()dB(A)。

A.70

B.85

C.75

D.65

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液化石油气贮罐的日常维修保养项目有哪些?

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物流网络规划

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