题干

如图所示,太阳能路灯的顶端是太阳能电池板,它白天向灯杆中的蓄电池充电,而夜晚则由蓄电池给路灯供电.下列关于太阳能路灯中能量转化的说法正确的是(  )  

A:白天阳光照射太阳能电池板时,太阳能转化为电能

B:白天阳光照射太阳能电池板时,太阳能转化为内能

C:白天太阳能电池板向蓄电池充电时,化学能转化为电能

D:夜晚蓄电池给路灯供电时,电能转化为化学能

上一题 下一题 0.0难度 选择题 更新时间:2020-02-13 01:59:19

答案(点此获取答案解析)

A

同类题4

阅读理解

    You have probably heard the saying,"When life gives you lemons,make lemonade."Since lemons are considered bitter and lemonade is considered sweet,the saying tells you to make the best out of a bad situation.

    Unfortunately,when something bad happens,it's not uncommon for most people to talk about it to anyone who'll listen,and complain about life,"Why me?"That's like getting a bag of lemons,putting them down,and thinking, "Lemons taste bad!I'd rather have chocolate!"If you don't make anything with the lemons,they will go bad.But what if you did something with them?What if you made lemonade?Isn't it possible to do something similar with a bad situation?

    Here's an example.Let's say you're about to go to the movies,but you discover you have a flat tire(瘪胎).You consider this a terrible thing. After all,you are really looking forward to spending some time with Ryan Gosling and Emma Stone.Now you're all stressed out,hating the tire,the car,and your life.But what if you called AAA,got your tire fixed or got caught up on things that you'd been meaning to do?What if you did some reading,or had coffee with a friend instead?A negative experience can be turned into something positive.Almost anything can work itself out into something better.You can't change what has happened,right?So make the best of it.I'm not saying it will be easy. The easy thing to do is complain about your bad situation and not consider what it could be turned into.

    Next time when some unfortunate things happen,stop and think,"How can I turn this around?How can I make it a positive experience?You needn't fear difficulties.As long as you keep on changing it,you will see the benefits(好处)at last.