单词拼写。 1. Blindness is a very serious ___
题型：填空题
问题：
单词拼写。
1. Blindness is a very serious ________(残疾).
2. Whenever she went, Brace would like to be _______(陪伴) by her husband.
3. She has a very ________(狭隘的) mind, for which she often becomes the target to be talked about.
4. The scientist _______(放弃) his research for lack of money.
5.They have _______(分发) the lands among the peasants so far.
6.Now _______(点击) the "yes" button on the screen.
7.The leading actress couldn't appear, and her ______(替代者) clearly didn't know the role very well.
8.Most torches work on two _______(电池).
9.Only a small _______(百分比) of the countries are thankful for our assistance.
10.He raised some proposals to _______(改革) the Labor Party.
，断开开关
、
，将滑动变阻器的滑片
移至最右端时，电路中的电流为
，小灯泡
恰能正常发光；闭合开关
，小灯泡
是其额定电功率的
，滑动变阻器的电功率为
；保持滑动变阻器的滑片
的定值电阻的电功率
为
，此时电路的总功率
与 
。设电路工作过程中电源两端的电压及小灯泡的电阻值保持不变，滑动变阻器的最大阻值班为
。求：
。