最新2013酒驾处罚标准和醉驾处罚新规定：酒后驾驶分两种：酒精含量达到20mg/100mL但不足80mg/mL，属于饮酒驾驶；酒精含量达到或超过80mg/100mL，属于醉酒驾驶．目前，饮酒驾驶属于违法行为，醉酒驾驶属于犯罪行为．酒驾容易引发交通事故的主要原因是（　　）

下列各组物质中，化学键类型完全相同的是（　　）

烟草花叶病毒(TMV)和车前草病毒(HRV)都能感染烟叶，但二者致病病斑不同，如图所示。下列说法中不正确的是

如图所示为小王同学设计的遮光感应烟雾探测器部分工作原理图。在一个外部光线无法进入的烟室中，装有一个激光发生器及带有一光敏电阻R₀（光照越强，R₀阻值越小，反之则越大）的电路，R为定值电阻，电源电压恒定。烟雾进入烟室后，激光被烟雾遮挡而使光敏电阻的阻值发生变化，烟雾越来越浓时，电路中电流表示数逐渐____，当电压表示数达到某一固定值时，探测器便会发出警报。如果要使烟雾浓度较小时探测器就能发出警报，你认为对电路中的R应如何调整？答：____

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    SPECIAL EVENTS THIS WEEKEND

Captain Good Fellow

    Do your children enjoy interesting stories, funny games, and exciting dances? Captain Good Fellow will be ready to teach all these things to children of all ages at the City Theatre on Saturday morning at 10:00. Free.

Walking Tour of the Town

    Forget your worries on Saturday morning. Take a beautiful walk and learn about local history. Meet at the front entrance of City Hall at 9:30. Wear comfortable shoes!

Films at the Museum

    Two European films will be shown on Saturday afternoon at the Museum Theatre. See Broken Window at 1:30. The workers will be at 3:45. For further information, call 4987898.

International Picnic

    Are you tired of eating the same food every day? Come to Central Park on Saturday and enjoy food from all over the world. Delicious and not expensive. Noon to 5:00 pm.

Take Me out to the Ballgame

    It's October, and tonight is your last chance to see the Redbirds this year. Get your tickets at the gate. It might be cold; don't forget sweaters and jackets.

Do You Want to Hear “The Zoo”

    “The Zoo”, a popular rock group from Australia, will give their first US concert tomorrow night at 8:00 at Rose Hall, City College.