雷电放电时,强大的雷电流由于静电感应和电磁感应会使周围的物体产生危险的过电压,造成设

题型:单项选择题

问题:

雷电放电时,强大的雷电流由于静电感应和电磁感应会使周围的物体产生危险的过电压,造成设备损坏丶人畜伤亡。雷电的这种破坏形式称为()。

A.直击雷

B.感应雷

C.雷电波侵入

D.雷电的折射与反射

考点:电工进网证考试电工进网证(高压类)电工进网证(高压类)题库
题型:单项选择题

在思想品德课上,老师为同学们展示了下面两则材料:

材料二  2013年5月4日开始实行的《最高人民法院,最高人民检察院关于办理危害食品安全刑事案件适用法律若干问题的解释》中规定,凡是在食品中添加禁用物质的行为均应以生产、销售有毒、有害食品罪定罪处罚。

据此,回答以下小题。

小题1:看到材料一, 同学们各抒己见,你认为不正确的是( )

A.小望:“食品安全问题的出现是因为少数生产经营者见利忘义,道德缺失

B.小箩:“食品安全问题主要是消费者过于宽容和忍让造成的。”

C.小金:“我们应加强社会诚信体系的建设。”

D.小丽:“食品安全事件频发严重影响了人们对国产食品的信任。”小题2:看到材料二,有同学指出:“在食品中放入添加剂的行为是不是违法行为?”对此疑问,同学们进行了探究。你认为不正确的是( )

A.小丽:“放入添加剂的行为触犯了食品安全法,是犯罪行为。”

B.小金:“滥用添加剂,侵犯了公民的食品健康权,是违法行为。”

C.小箩:“添加禁用物质的行为是犯罪行为。”

D.小望:“在合法范围内使用添加剂,不是违法行为。”

题型:单项选择题

猝死抢救时,最先进行的基础心肺复苏包括()。

A.气管插管

B.胸外按压

C.除颤复律

D.心脏起搏

E.建立静脉通路

题型:单项选择题

阅读理解。

      COPENHAGEN-The world is gathered in Copenhagen for the U.N. climate summit, but Denmark's

bicycle-friendly capital has also given its name to a movement of cities trying to find a kinder way to

commute (往返上下班).

      Nearly 40 percent of Copenhagen's population cycle to work or school on ubiquitous (无处不在的)

paved cycle paths. Many residents take to their bikes year-round, braving rain and snow through the

winter in a city where the bicycles outnumber the people.

      Amsterdam and Beijing too are known for their bicycles, but the Danish capital is where urban planners

from around the world have been looking for ways to get their people out of cars and up onto bikes, an

effort known as Copenhagenisation. 

      Klaus Bondam, Copenhagen's technical and environmental chief, calls himself a "mega cyclist" and

says the bike's popularity stems partly from high taxes on cars which meant working-class Danes could

not afford to drive in the 1930s and 40s. "Today you'll meet everybody on the bicycle lanes-women and

men, rich and poor, old and young," Bondam said.

      The local government has during the last three years invested more than 250 million crowns ($49.42

million) in bicycle lanes and to make the traffic safer for bicyclists. Today around a third of the population

drive cars to work or study, another third take public transport, while 37 percent cycle-a figure the city

aims to boost to 50 percent by 2015.

      There are many benefits when citizens choose bicycles over cars: pollution and noise decline, public

health improves, and more people on bikes or walking creates a sense of safety in the city. Fewer parked

cars leaves more space for playgrounds, parks, shopping areas and other useful public places.

1. According to the first paragraph, Copenhagen is better known as ______. [ ]

A. a city without cars

B. a bicycle-friendly city

C. Denmark's capital

D. the U.N. climate summit

2. We can learn from the second and the third paragraph, ______. [ ]

A. there is no path for cars during rainy and snowy days

B. citizens are limited to have only one bike for each person

C. two-thirds of people in Copenhagen cycle to work or school

D. city planners try their best to encourage more citizens to ride bikes

3. Bikes are popular in Copenhagen partly because ______. [ ]

A. the citizens are unable to afford to buy a car

B. the rich tend to keep fit by cycling to work

C. young people regard cycling a fashion to follow

D. high taxes were paid for cars in the 1930s and 40s

4. Which of the following is NOT the benefit of cycling? [ ]

A. Saving time on the road.

B. Declining pollution and noise.

C. Improving public health.

D. Creating safety in the city.

题型:单项选择题

使用条形码阅读器输入数据的方式是 (29)

A.数据自动化输入方式

B.交互输入方式

C.传统的数据输入方式

D.电子数据交换

题型:单项选择题

烟草种子色泽检验的程序与方法?

更多题库