2007年3月15日，十二届全国人民代表大会第五次会议表决通过了《民法总则草案》。回答题。

    We all know that food gives us energy, but sometimes it can make us much happier when we feel bad. Studies show that foods such as sea fish, bananas, pumpkins and chicken can help fight against bad moods. How can they affect our moods?

    Studies show that people living by the sea appear much happier than other people, because the fresh sea air helps them clear their minds and they eat a lot of sea fish.

    Bananas have something that is full of Vitamin B6. Having more bananas can help us make a quick decision, and become more confident.

Eating pumpkins can also help people get into a good mood because it's rich in Vitamin B6 and iron(铁)and it will make us happier.

    Are you in a bad mood? If you are , don't sit alone. Go to eat such happy food with your friends. Maybe you'll be better.

一 How much are the two packets of ____ (battery)?

一 Ten yuan, please.

小明用焦距为10cm的凸透镜、蜡烛、光屏等器材，探究凸透镜成像的规律。

（1）如图所示，把蜡烛、凸透镜、光屏依次放在光具座上，点燃蜡烛，将烛焰、凸透镜、光屏三者中心调到____ ，这样做是为了____ 
（2）当蜡烛距凸透镜25cm时，移动光屏，可在光屏上得到一个清晰的倒立、____ （选填“放大”或“缩小”）的____ 。（选填“实”或“虚”）像。
（3）小明把爷爷的老花眼镜放在凸透镜与蜡烛之间，发现光屏上的像变得模糊不清。她应当向____ （选填“远离”或“靠近”）透镜的方向移动光屏，可再次得到清晰的像。

He is a very i____（有影响的）man in the government and is in an important position.