带传动的主要失效形式是什么?

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问题:

带传动的主要失效形式是什么?

考点:机械工程机械设计基础机械设计基础题库
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采用SM模式驾驶时,HMI上有黄标和红标显示,黄标代表(),红标代表紧制速度码。

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影响井斜的原因可能有哪些?

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阅读理解。

     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.

1. By the time the article was written, the fire ____.

A. had just broken out

B. had been put out

C. was spreading violently (猛烈地)

D. was coming to an end

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

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 danger

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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病原微生物的危害程度分类主要考虑的因素不包括()。

A.微生物的致病性

B.微生物的传播途径和宿主范围

C.当地所具备的防范措施

D.当地所具备的有效治疗措施

E.微生物培养的代次

题型:问答题 简答题

关于扳机点注射的叙述,正确的是()

A.类固醇与利多卡因同用

B.扳机点注射需在门诊重复几次

C.最严重的并发症是局部血肿

D.应只在紧张肌束的一部分插入针头

E.每次门诊只注射一个扳机点

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