问题 实验题

在“探究水沸腾”的实验中,某实验小组观察到图(a)、(b)所示的两种情景。

(1)图_______ 是水沸腾时的情景。

(2)写出实验中你还观察到的两个实验现象。___________________________________________

(3)为了减少从开始加热到沸腾时的时间,可以采取哪些措施。(至少写出两条措施)

_______________________________________________

答案

(1)(a)

(2)沸腾前水的响声大,沸腾后水的响声变小;沸腾前温度计的示数不断升高,沸腾后继续加热而温度计的示数保持不变;沸腾时水的内部和表面同时发生剧烈的汽化现象。(答案不唯一,写出两个现象即可)

(3)适当减少水量;给烧杯加盖子;适当提高水的初温等。(合理即可,任选两项即可)

单项选择题 A1型题
问答题

Once a circle missed a wedge. The circle wanted to be whole, so it went around looking for its missing piece. But because it was incomplete and therefore could roll only very slowly, it admired the flowers along the way. It chatted with worms. It enjoyed the sunshine. It found lots of different pieces, but none of them fit. So it left them all by the side of the road and kept on searching. Then one day the circle found a piece that fit perfectly. It was so happy. Now it could be whole, with nothing missing. It incorporated the missing piece into itself and began to roll. Now that it was a perfect circle, it could roll very fast, too fast to notice flowers or talk to the worms. (46) When it realized how different the world seemed when it rolled so quickly, it stopped, left its found piece by the side of the road and rolled slowly away.

(47) The lesson of the story, I suggested, was that in some strange sense we are more whole when we are missing something. The man who has everything is in some ways a poor man. He will never know what it feels like to yearn, to hope, to nourish his soul with the dream of something better. He will never know the experience of having someone who loves him give him something he has always wanted or never had.

(48) There is a wholeness about the person who has crone to terms with his limitations, who has been brave enough to let go of his unrealistic dreams and not feel like a failure for doing so. There is a wholeness about the man or woman who has learned that he or she is p enough to go through a tragedy and survive, she can lose someone and still feel like a complete person. Life is not a trap set for us by God so that he can condemn us for failing. Life is not a spelling bee, where no matter how many words you’ve gotten right; you’re disqualified if you make one mistake. (49) Life is more like a baseball season, where even the best team loses one third of its games and even the worst team has its days of brilliance. Our goal is to win more games than we lose.

When we accept that imperfection is part of being human, and when we can continue rolling through life and appreciate it, we will have achieved a wholeness that others can only aspire to. (50) That, I believe, is what God asks of us—not "Be perfect", not "Don’t even make a mistake", but "Be whole."

(50) That, I believe, is what God asks of us—not "Be perfect", not "Don’t even make a mistake", but "Be whole."