功率为P的电炉,因电阻丝烧断,去掉原长的,仍接入原电路里(电源电压不变),此时电

题型:选择题

问题:

功率为P的电炉,因电阻丝烧断,去掉原长的,仍接入原电路里(电源电压不变),此时电炉的实际功率是(  )

A.P

B.P

C.2P

D.4P

考点:影响电阻大小的因素电功率的计算
题型:选择题

SHANGHAI: The Transportation Information System for 2010 Shanghai World Expo has been completed and put into trial operation, officials said yesterday.

The system which consists of three sub-systems will provide seven options to receive transportation information, including websites, transportation guides, radio and TV broadcasting, hotlines, message signs, mobile phone and enquiry machines, to satisfy tourists’ requirements for transport information in the Expo garden and around the city at all time.

Option 1: Official site for Expo traffic information

Inspired by Aichi Expo and the Beijing Olympic Games, the Shanghai event will also launch its official website of traffic information, www.jtcx.sh.cn.Mobile phone users can log on to www.jtcx.sh.cn/m.The website delivers daily traffic information as well as travel guide around Expo garden, and advocate using public transport during the event.

Option 2: Expo Transportation guide

Two portable travel guides were produced for the convenience of tourists in the Yangtze River Delta.

One mainly targets visitors from the 19 prefecture-level cities of the Yangtze River Delta.The map introduces information of intercity coach lines, car parks, subway transfers.It will be distributed free at highway tolls and is also available for download on the website.

The other one focuses on visitors in Shanghai.The map will detail the various entries leading to the Expo site, as well as bus stops and subway stations around the city.The introduction of over 90 bus lines connecting the Expo garden to the rest of the city will also be listed.The map will be available at hotels, railway stations, airports and residential areas.

Option 3: Radio and television broadcasts

Visitors can also get updated traffic information at home or on their mobile devices as the Shanghai Traffic information center will broadcast live traffic condition via radio and TV during the event, so that travelers can adjust their travel plan accordingly.

Option 4: Expo transport hotline

If radio and television broadcasts can not meet your needs of traffic information, organizers in Shanghai have also set up a special hotline for Expo traffic enquiries.There will be two hotline numbers 962010 and 12319 at your service twenty-four hours.

Option 5: Variable message signs

For drivers the variable message signs will become the first choice to access to traffic information.During the Expo, the signs will play an important role in helping drivers to receive traffic flow, speed, models and other information, as well as traffic incidents and road closure information, so as to avoid congestion.

Option 6: Mobile phone browsers and taxi terminals

Visitors can obtain real-time traffic conditions via mobile phone browsers.Traffic information will also be provided to car mounted terminals on the 4,000 Expo taxis, which will enable drivers to have timely access to real-time status on roads.

Option 7: Touch screen enquiry machine

As for visitors who stay at hotels who are unfamiliar with the place, the tourism bureau have set up in more than four hundred 3-star hotels the Tourist Information enquiry machine.Visitors can check at terminal routes to Expo garden from the hotels.

1.Which of the following is the best title of the passage above?

A.Seven ways to get Expo transportation info

B.Information on the move

C.Transportation on the way             

D.Shanghai and Expo

2.Which of the following is NOT true according to the passage?

A.Visitors can get the map of Shanghai Expo Transportation free of charge.

B.Visitors have access to the hotline of Expo traffic enquires only at night.

C.Traffic drivers will be well informed of the traffic conditions on the road.

D.Not all the 3-star hotels are equipped with the screen enquiry machines.

3.The underlined word “congestion” probably means ____.

A.squeeze               B.jam             C.noise           D.mess

4.During the Shanghai Expo, tourists can know the traffic information in the following way EXCEPT ____.

A.TV   B.Radio    C.Internet       D.Magazine

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下列哪种物质不能作气雾剂的抛射剂()

A.二氧化碳

B.氮气

C.丙烷

D.一氯甲烷

E.氟氯烷烃类

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巴州人口计生委提出的“八巩固、八创新”工作机制建设的内容是什么?

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胆胃不和,痰热内扰。胆怯易惊,虚烦不宁,失眠多梦,呕吐呃逆,癫痫等证。治宜选用

A.温胆汤
B.二陈汤
C.蒿芩清胆汤
D.左金丸
E.贝母瓜蒌散

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在毒品犯罪比较严重的地方,党政主要领导同志要经常过问禁毒工作,并(),指导和督促有关部门,及时解决工作中的突出问题。

A.下发文件

B.召开会议

C.深入实际

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