题干

为了比较水和食用油的吸热能力,小明用两个相同的装置做了如图所示的实验。用温度计测量液体吸收热量后升高的温度值,并用钟表记录加热时间。实验数据记录如下表。

物质质量/g初始温度/℃加热时间/min最后温度/℃
6020645
食用油6020668

(1)在实验过程中控制加热时间相同,通过比较____ 来研究水和食用油吸热能力的差异。
(2)在此实验中,如果要使水和食用油的最后温度相同,就要给____ 加热更长的时间,此时水吸收的热量____ (选填“大于”“或”“小于”或“等于”)食用油吸收的热量。
(3)通过实验可以得到不同的物质吸热能力不同,物质的这种特性用____ 这个物理量来描述。

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升高的温度,水,大于,比热容

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    Most people say that most people have not more than 30 friends at any given time, and 400 over the whole of their lives. However, on social networking sites, most users have about 150 friends. If these numbers are correct, then friendship means different things in different situations.

    Also, there are no rules about friendship. There are no instructions about how to make friends, how to keep friendships going, and how to finish friendships if we want to move on. People have very different opinions about this: some people would die for their friends and they value them more than family. Others say that friends are temporary, only there to help each other until they are no longer needed. If people with such different views become friends, this can lead to problems.

    Because of these different definitions of friendship, it is easy to be unhappy about our friendships. We may want them to be deeper or closer, or we may want to have more friends in our lives. Sometimes we simply do not have the time to develop our friendships, or we fear we have left it too late in life to start. If we move to another country or city, we have to find ways, to make new friends again.

    This dissatisfaction shows us how important friendships are for most of us. We should not think that it could be too late to build friendships. We also need to understand that the need to be around other people is one that is shared by many. Therefore, we should not be too frightened about starting to talk to people who in the future may become our friends: it is likely that they too would like to get closer to us. Remember what people say: strangers are friends we have not met yet.