解析：马尾松耐贫瘠，但红漠化的土壤过于贫瘠是造成低效林 的关键因素；而侵蚀裸露坡地近地表干热化的小气候和地表无法 拦蓄径流也是低效林形成的重要原因。 答案：B

福建省长汀县朱溪河小流域的地貌类型主要为低山丘陵，海拔 介于267683m之间。流域内水土流失严重，且多分布于距村庄 近、交通方便、坡度较小、风化土层较厚的丘陵区。当地曾经选用 能适应酸性土壤、耐贫瘠干旱生长环境的马尾松作为红壤退化地 治理的树种，但结果却是马尾松生长发育逐渐衰竭，林分结构和稳 定性失调，生态系统功能逐步退化甚至丧失，成为低效林。据此完 成13~15题。 13.推测福建省长汀县朱溪河小流域水土流失的主要原因是 A.河网密布，水蚀作用强 B.落差大，流水、重力作用明显 C.山地面积广，地形崎岖 D.人口增长，过度开垦和樵采

good introduction to the course,and it will probably cover a lot of useful information about the upcoming semester. W:Maybe you're right.It's just that I hate being in large groups.I'm not going to know anyone there. M:You'll know me,though.Besides,I think it will be a good chance to meet people,and there will probably be times when we will have to work together in groups. W:Our course outline seems to have all the information we need. I can't see there is anything new to discuss. M:I heard there will be a former graduate there to provide details about what kind of job opportunities are out there after we graduate.It could be more helpful than you think. W:I don't know.

W:Well,I've got something quite different from that this time. No singing at all.Though it's got some great music,it's an adventure in space.I'm sure you'll enjoy that more than a comedy we saw last time. M:Great!Let's watch that then. (Text 7) W:Happy New Year！ M:Happy New Year!Kate,do you have any wishes for the new year? W:Of course.I hope I can get a good score in the college en- trance examination in June this year,and I can visit Beijing during the summer holiday. M:Which is the most important?

第一部分 听力（共两节，满分30分） 第一节（共5小题；每小题1.5分，满分7.5分） 听下面5段对话。每段对话后有一个小题，从题中所给的A、 B、C三个选项中选出最佳选项，并标在试卷的相应位置。听完每 段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。 每段对话仅读一遍。 1.What does the woman use to dry the car windows? A.A cloth. B.A towel. C.Newspaper. 2.When does the conversation take place? A.In the evening. B.In the afternoon.

B.Brother and sister. C.Schoolmates. 听第10段材料，回答第17至20题。 17.How often does the competition take place? A.Every year. B.Every other year. C.Every four years. 18.How many people took part in the competition this year? A.At least 100. B.At least 120. C.At least 200. 19.Who is the competition intended for? A.Young songwriters.

B.A musical. C.An adventure. 听第7段材料，回答第8至10题。 8.What are the speakers talking about? A.Food. B.New Year wishes. C.An examination. 9.What is the woman? A.A senior middle school student. B.A junior middle school student. C.A senior middle school teacher. 10.What can we learn about the woman? A.She hates junk food.

very similar way to the networks of neurons(神经元)in our brains,and when one tree 29 (destroy),it affects all. Simard talks about“mother trees”, 30 (usual)the lar- gest and oldest plants on which all other trees depend.She ex- plains how dying trees pass on the wealth to the next generation, 31 (transport)important minerals to young trees so they may continue to grow.When humans cut down "mother trees' with no awareness of these highly complex "tree societies"or the networks 32 which they feed,we are reducing the chances of survival for the entire forest. "We didn't take any notice of it,Simard says sadly.33 we could put across the message to the forestry industry,we could make a huge difference to our environmental 34 (pro- tect)for the future.

on the screen. 23.What does the underlined word "skewed"in paragraph 4 probably mean? A.Special. B.Casual, C.Inaccurate. D.Amazing. 24.What does Faux suggest to avoid stopwatch errors? A.Improving the quality of digital watches. B.Standardizing the operation of watch-users. C.Developing a better algorithm for digital watches. D.Using large display tables instead of an algorithm.

C.In the morning. 3.Why hasn't the mail arrived on the third floor? A.Ron isn't taking it. B.Ron isn't up there yet. C.Ron has forgotten it. 4.What does the man think of the shampoo? A.It sells bad. B.It is of low quality. C.It works very well. 5.Where are the speakers? A.Next to a road. B.At an animal shelter. C.At the police station.