吾尝终日而思矣,____;____,不如登高之博见也。(《荀子·劝学》)
— _______. Robots will help people a lot.
(2015•四川达州)—Excuse me, could you please tell me the way to the ? I have had too much water.—Go along the street and you will find one.
如图甲是灯泡L和电阻R的I-U关系图像,灯丝电阻受温度的影响,温度越高电阻越大.将L和R以两种不同的方式接在同一电源上,如图乙和丙.若乙图中U1︰U2= m,丙图中I1︰I2= n,则下列关系式中正确的是()