A:book
B:egg
C:fish
A: I ____ (have) a cold yesterday.
B:I am sorry. I am happy you feel ____ (good) now.
做测定“小灯泡的电功率”实验时,所用器材有:电压为3V的电源,额定电压为2.5V的小灯泡,以及符合实验要求的滑动变阻器、已调零的电流表和电压表、开关、导线若干.