一测温用的铂金属丝,在常温(20°C)时,电阻为118 ,温度为100°C时,其电阻为154.8 ,求(1)铂丝的电阻温度系数。(2)如果把这段电阻丝放入电炉,其阻值将增加450 ,求炉温。 A. in; brought B. in; bought C. wear; bought( )8. Look! They're waiting___the bus over there. D. in E. on F....