问题
单项选择题
青蛙既不能完全在水中生活，又不能完全在陆地生活的主要原因是（）.
A.青蛙体表无覆盖物，失水较快
B.青蛙的呼吸依赖肺和皮肤两种器官
C.在水中或陆地都没有足够的食物
D.身体散热使，不能长时间留在水中
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
青蛙既不能完全在水中生活，又不能完全在陆地生活的主要原因是（）.
A.青蛙体表无覆盖物，失水较快
B.青蛙的呼吸依赖肺和皮肤两种器官
C.在水中或陆地都没有足够的食物
D.身体散热使，不能长时间留在水中
参考答案：B
第二节：阅读填空（共10小题，每题1分，满分10分） 认真阅读下面短文，并根据所读内容在文章后表格里填入最恰当的单词。注意：每空填一个单词。 Whenever we meet with difficulty or failure, teachers, parents or others often say to us or perhaps we say to ourselves, “Never give up.” These can be encouraging words and words of determination. A person who believes in himself will keep trying to reach his goal no matter how many times he fails. In my opinion , the quality of determination to succeed is an important one to have. Therefore, I believe that we should never give up. One reason is that if we give up too easily, we will rarely achieve anything. It is not unusual for us to fail in our first attempt at something new, so we should not feel disappointed and should try again. Besides, if we always give up when we fail , we will not be able to develop new skills and grow. Another reason we should never give up is that we can learn from our mistakes so that we can not make the same ones. If we do not try again, the lesson we have learned is wasted. Finally, we should never give up because as we work to reach our goals, we develop confidence, and this confidence can help us succeed in other areas of our lives. If we never challenge ourselves, we will begin to doubt our abilities. In short, it is important that we do not give up when working for our goals. Whether we succeed in the end or not , we will learn something , and what we learn will help us to become better and more confident. Furthermore, if we give up , we have no chance of attaining our goals any more , but if we keep making great efforts, there is always a chance that we will succeed one day.
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