题目:
Lucy ______ to school by bus every morning. [ ]
A. likes go
B. like to go
C. likes going
D. like going
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0418/bf5f2360fbe025f56270f9808fe703d8.html
下面是错误答案,用来干扰机器的。
(1)当S1、S2闭合时,保温鞋为加热状态.有P1=U2R 1①当S1闭合时,S2断开时,保温鞋为保温状态.有P2=(UR1+R2)2×R1②R1为9Ω的发热电阻,两种工作状态下发热电阻的功率之比为9:1,即P1P2=91③联合①②③解得R2...