试题与答案

如图所示,坐标空间中有场强为E的匀强电场和磁感应强度为B的匀强磁场,y轴为两种场

题型:计算题

题目:

如图所示,坐标空间中有场强为E的匀强电场和磁感应强度为B的匀强磁场,y轴为两种场的分界面,图中虚线为磁场区域的右边界;现有一个质量为m,电荷量为-q的带电粒子(不计重力),从电场中坐标位置(-,0)处以初速度v0沿x轴正方向开始运动,且已知=,试求:

(1)粒子第一次通过y轴时的位置?

(2)若要使带电粒子能穿越磁场区域而不再返回电场中,磁场的宽度d应满足的条件?

答案:

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在“探究物质质量与体积的关系”实验中,请填写空格处的内容。

① 现有几块大理石小块,质量分布均匀、形状不规则。某小组同学探究这些小块大理石的质量与体积的关系,用  _________测量大理石的质量,用  _________ 和水测量大理石的体积。

小组中甲同学在其中取出一块大理石分别测量三次,并将实验数据记录在表一中,小组中乙同学在其中分别取出大小不等的三块各测量了一次,并将实验数据记录在表二中。

② 分析表二,可以得出初步结论:同种物质,质量与体积成  _________  关系。

③你认为甲同学和乙同学的方法比较,_________ 的方法是正确的(选填“甲同学”或“乙同学”)。理由是      _____________    

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题型:阅读理解

第三部分:阅读理解(共20小题.每小题3分,满分60分)       

阅读下列短文,从每题所给的四个选项( A, B,C,和D)中,进出最佳答案.并将答案写在答题卡上。

A  

Ticket price increases at HK Disney

Source:Xinhua | 02—05—2009 11:39

Hong Kong Disneyland announced on Tuesday it will raise weekday admission prices for mainland and overseas tourists by about 19 percent.But Hong Kong residents and tourists who purchase tickets through travel agents can still enjoy the old prices until June 30.    

A one-day admission will cost HK $350($45)for adults and HK $250 for children aged up to 11 from Monday, the previous charges for weekends.Adults were previously admitted for HK $295 and children HK $210.

A Hong Kong Disneyland spokesman said the park does not expect the new pricing structure to have an immediate impact on attendances, as research shows guests choose when to visit the attraction based on time available rather than ticket prices.But the hikes(the rise of prices)drew immediate criticism from the industry.The greater tourism industry fears it may harm mainlanders willingness to visit Hong Kong.    

Joseph Tung Yao-chung, executive director of Travel Industry Council of Hong Kong, said the decision was unwise in the current financial climate.He also urged the company to rethink its decision, during an interview with Southern Metropolis Daily.    

56.On September 10 of 2009(weekday),  Hong Kong  residents and tourists will have to spend__________buying three children tickets.

A.HK $360    B.$ 360    C .HK $750  D.HK $885    

57.There is a family with five people, John,his father,mother,grandfather and grandmother.They are from America, John is eleven years old.If they visit the place on June 30 2009(weekday),they will spend about________in total.

A.$212   B.$ 1650    C .HK $1400  D.$1390    

58.What can we infer from the passage?

A.Joseph Tung Yao-chung disagreed about the ticket price increase at HK Disney.

B.Hong Kong Disneyland will make a lot of money by raising weekday admission prices for mainland tourists.    

C.The Hong Kong Disneyland spokesman didn't like the new pricing structure.

D.Only tourists from mainland visit Hong Kong Disneyland. 

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