问题 选择题

将具有竞争关系的甲、乙两种水生动物,共同培养在无铜离子的适宜培养液中,其数量变化如图a所示;而共同培养在有一定铜离子浓度的培养液中,其数量变化如图b所示。下列叙述中正确的是

[ ]

A.甲在无铜离子污染环境中呈“J”型增长,而在有铜离子污染环境中呈“S”型增长

B.乙在无铜离子污染环境中呈“S”型增长,而在有铜离子污染环境中呈“J”型增长

C.从无铜离子污染环境转入有铜离子污染环境,甲、乙在竞争中的优、劣势地位将发生改变

D.从无铜离子污染环境转入有铜离子污染环境,甲、乙两种群的基因频率将保持稳定不变

答案

答案:C

写作题

阅读下面的短文,然后按要求写一篇150词左右的英语短文。

There are all kinds of stress in our daily lives such as stress from work, stress from study and stress from examinations. How to manage stress is thus a very important problem that we have to deal with properly. I think stress itself doesn’t exist. It’s only because we consider things to be bad and regard all of them as our own fault and won’t forgive ourselves. As we all know, there is nothing you can do without error. So it’s impossible to expect everything to be perfect. If we have done our best,  although not successfully, there is nothing to regret. And we don’t need to blame ourselves continuously. In fact we have done a quite good job. Then we will feel the stress less. We will stay healthy and do well in the future. Eventually we will be successful.

[写作内容]

1.概括短文内容要点,该部分的字数大约30词左右;

2.就“如何化解心理压力”这个主题发表你的看法,至少包括以下的内容要点,该部分的字数大约120词左右。

a)简述你生活学习中遇到过造成较大心理压力的困难;

b)你是如何化解心理压力的;

c)谈谈你对化解心理压力的体会。

[写作要求]

你可以参照阅读材料的篇章结构、有关内容,但不得直接引用原文中的句子。

[评分标准]

概括准确、语言规范、内容合适、篇章连贯。

______________________________________________________________________________________________________________________________________________________________

______________________________________________________________________________________________________________________________________________________________

______________________________________________________________________________________________________________________________________________________________

______________________________________________________________________________________________________________________________________________________________

_________________________________________________________________________________

单项选择题