题目

用所给词的适当形式填空 1．I want two________(tomato). 2．Let's________(go) to a movie. 3．There are two________(comedy) on now. 4．How much are the________(carrot)? 5．Do you like________(documentary)? 6．Do they want________(go) swimming? 7．Thursday is the________(five) day of a week. 8．Do you know________(she) name? 9．I like________(thriller) very much. 10．The movie is very________(excite).在综合实践活动课上，小明设计了一个如图所示的调光灯电路．已知电源电压不变，灯泡L标有“6V 3W”字样，定值电阻R1的阻值为6Ω．闭合开关，将滑动变阻R2的滑片P从最右端逐渐滑至最左端，记下多组对应的电压表和电流表示数，描绘出的I﹣U图线如图乙所示．求：（1）灯泡L正常发光时的电流和电阻；（2）电源电压；（3）滑动变阻器R2的滑片P在最右端时，灯泡L的实际功率．