转炉煤气含氧量达到()电除尘联锁停电。

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问题:

转炉煤气含氧量达到()电除尘联锁停电。

考点:材料能源行业技能考试煤气站煤气操作考试煤气站煤气操作考试题库
题型:填空题

如图所示,两根相距为L的竖直平行金属导轨位于磁感应强度为B方向垂直纸面向里的匀强磁场中,导轨电阻不计,另外两根与上述光滑导轨保持良好接触的金属杆ab、cd质量均为m,电阻均为R.若要使cd静止不动,则ab杆应向_______运动,速度大小为___________,作用于ab杆上的外力大小为_________

.

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阅读理解。

     In 1837, the historian Carlyle made the first recorded use of the word "queue" (排队). He spoke of the

French and their "habit of standing in a queue". Forty years later Paris was the best place to wait in line.

     However, queuing became popular in Britain too. The Second World War was the golden age of queuing,

and people joined any line in the hope that it was a queue for something to buy. This was the source of many

Second World War jokes:

      Shopkeeper to customer: Excuse me, miss, are you pregnant (怀孕)?

     Customer: Well, I wasn't when I joined the queue.

     Today, according to research in America, we (in Britain) can spend up to 5 years of our lives queuing-as

compared to twelve months looking for things we have lost. But things may be changing. Many people no

longer have the patience to stand in a queue. The law of the jungle (丛林) has begun to operate at bus stops,

with people using their arms to push others out of the way.

     One way to make life easier is to introduce "queue management". Customers at supermarket cheese

counters can now take a ticket with a number which appears on a screen when it is their turn. And while they

wait for their number, they can do a bit of shopping. In some booking offices there is also a system telling

customers how long they may have to wait before they are served.

     One of the latest technical progress is the use of an electronic scanner (电子识别器) which can read all

the contents of your shopping basket or trolley in just a few seconds. If these become popular, queuing in

supermarkets may become a thing of the past.

     But some people just like queuing. One man queued all night for Harrods famous January sale, and then

returned home for breakfast at nine o' clock the next morning without going into the shop.

1. The joke in Paragraph 2 implies that the young woman ______.

A. has been waiting in the queue for a long time

B. doesn't need to stand in the queue

C. enjoys standing in the queue

D. has stood in the wrong line

2. According to the passage, which of the following is true?

A. The British spend more time queuing than looking for lost things.

B. The Americans criticized the British for their way of queuing.

C. The British are always patient when they wait in line.

D. People queue only when they want to buy something.

3. The British try to solve the problem of queuing by all the following EXCEPT _____.

A. making a law to prevent queuing

B. telling the customers the waiting time

C. using numbered tickets to put the customers in order

D. checking the price of the goods customers buy with a scanner

4. We can infer from the passage that ______.

A. queue management doesn't work well

B. there is still queuing in England

C. we don't see much queuing in Paris

D. the French like queuing more than the British

题型:填空题

涎腺黏液囊肿最常见的部位是()

A.下唇

B.上唇

C.舌下腺

D.腮腺

E.腭腺

题型:填空题

流行性腮腺炎为().

A.呼吸道飞沫传播

B.粪-口传播

C.血液及注射传播

D.虫媒传播

E.接触传播

题型:填空题

关于中间系统到中间系统(简称IS-IS)路由协议的说法,以下说法正确的两项是()

A.IS-IS是距离向量路由协议

B.IS-IS在AS之间使用

C.IS-IS是链路状态协议

D.IS-IS在一个管理域或一个网络内使用

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