在极坐标系中，已知圆C的圆心C（$\sqrt{2}$，$\frac{\mathrm{\pi }}{4}$），半径r=$\sqrt{3}$．

（Ⅰ）求圆C的极坐标方程；

（Ⅱ）若α∈0，$\frac{\mathrm{\pi }}{4}$），直线l的参数方程为$\left\{\begin{array}{c}x=2+t\cos \alpha \\ y=2+t\sin \alpha \end{array}\right.$（t为参数），直线l交圆C于A、B两点，求弦长|AB|的取值范围．

如图，金属导轨水平放置，导轨间的距离为L，处在磁感应强度为B的匀强磁场中，磁场方向与导轨平面成θ角．金属导轨的一端接有电动势为E、内阻为r的直流电源．现把一根金属杆ab放在金属导轨上，金属杆静止．金属杆ab质量为m，长为L，电阻为R，求：

“神舟七号”载人航天飞行的圆满成功标志着我国成为世界上第三个独立掌握空间出舱关键技术的国家，航天员翟志刚出舱后手拿小国旗的场景在国人的心中留下了非常深刻的印象．假定“神舟七号”绕地球做匀速圆周运动，且大气阻力不计．出舱后翟志刚举着小国旗不动时，下列说法正确的是（   ）

    In the coming months, we are bringing together artists from all over the globe, to enjoy speaking Shakespeare's plays in their own language, in our Globe, within the architecture Shakespeare wrote for. Please come and join us.

    National Theatre of China   Beijing︱Chinese

    This great occasion will be the National Theatre of China's first visit to the UK. The company's productions show the new face of 21st century Chinese theatre. This production of Shakespeare's Richard III will be directed by the National's Associate Director, Wang Xiaoying.

    Date & Time: Saturday 28 April, 2:30pm & Sunday 29 April, 1:30pm & 6:30pm

    Marjanishvili Theatre   Tbilisi | Georgian

    One of the most famous theatres in Georgia, the Marjanishvili, founded in 1928, appears regularly at theatre festivals all over the world. This new production of As You Like It is helmed (指导) by the company's Artistic Director

    LevanTsuladze.

    Date & Time: Friday 18 May, 2:30pm & Saturday 19 May, 7:30pm

    DeafinitelyTheatre London | British Sign Language (BSL)

    By translating the rich and humorous text of Love's Labor's Lost into the physical language of BSL, Deafinitely Theatre creates a new interpretation of Shakespeare's comedy and aims to build a bridge between deaf and hearing worlds by performing to both groups as one audience.

    Date & Time: Tuesday 22 May, 2:30pm & Wednesday 23 May, 7:30pm

    Habima National Theatre Tel Aviv | Hebrew

    The Habima is the centre of Hebrew-language theatre worldwide. Founded in Moscow after the 1905 revolution, the company eventually settled in Tel Aviv in the late 1920s. Since 1958, they have been recognized as the national theatre of Israel. This production of Shakespeare's The Merchant of Venice marks their first visit to the UK.

    Date & Time: Monday 28 May, 7:30pm & Tuesday 29 May,7:30pm