8．盛夏季节，在炎炎烈日下，人们闷热难耐，此时若来到浓荫避日的树林下会顿觉凉爽。下列事实中，可以用来解释其原因的是
①植物能进行蒸腾作用 ②植物能进行呼吸作用
③人靠出汗来调节体温 ④物体在光直射时，吸收的热量多
(A)①② (B)①⑧ (C)①④ (D)②③
7．一棵重0．2kg的柳树栽培于土壤中，三年后连根挖出，称其干重达llkg，这些增加的物质主要来源是
(A)大气中的C02 (B)土壤中的水分 (C)大气中的02 (D)土壤中的矿质元素
6．若用质量浓度为0．3g／mI。的蔗糖溶液处理生物细胞，细胞出现质壁分离现象，对此合理的解释可能是
(A)实验材料是根尖分生区细胞 (B)实验材料是死细胞
(C)实验材料是蚕豆叶表皮细胞 (D)实验材料是动物细胞
5．正在结番茄的植株，其吸收水分主要用于
(A)光合作用 (B)茎叶生长 (C)果实膨大 (D)蒸腾作用
4．下列前项是被鉴定的有机物、中项是使用的试剂、后项是反应所产生的颜色。三项均正确的是
(A)DNA、双缩脲、蓝色 (B)脂肪、苏丹Ⅲ、橘黄色
(C)蛋白质、斐林试剂、紫色 (D)可溶性还原糖、二苯胺、砖红色
3．用胰液、肠液处理果蝇唾液腺巨大染色体，得到一连续的细长纤丝，此细丝可能是
(A)多肽链 (B)染色质丝 (C)DNA分子 (D)染色单体
2．纤维素是一种多糖，在下列生物中容易找到的是
(A)水螅 (B)草履虫 ． (C)芹菜 (D)竹节虫
1．有一类生物，从生物体的微观结构看，它没有核膜和多种细胞器，从生态系统的宏观结构看，属于生产者。这类生物是
(A)细菌 (B)绿藻 (C)真菌 (D)蓝藻
8. 你有必要跟老师面对面谈一下你的问题。(face to face)
_____________________________________________________________________________________________.
◆II.根据短文意思,从下表所给的词汇中选出合适的单词或短语,并用其正确形式填空。
calm, fell in love, recover, dislike, upset,
be concerned about, outdoors, ignore, grateful, suffer from
Last weekend, I was very 1 because I 2 my dog who 3 a strange illness. At the same time, I felt hateful toward people around me. My mother suggested me going 4 for a walk. So I did. It was the first time that I had 5 with nature, while at the same time I was forced to be alone and face all the things that I had 6 before. After the walk, I was 7 and realized that the people and things around me were very important to me. I should be 8 to all of them. I should love all of them, including the ones that I 9 . Anyway, the doctor said my dog would 10 soon.
◆ III.情景对话。
A: Hello! Tom. What’s the matter?
B: I can’t move my bike any longer.
A: Is it broken again?
B: 1
A: Leave it here and I can take you home.
B: 2 I need it to go to school tomorrow morning.
A: All right, but ... why not get it repaired? There is a man repairing bikes ahead.
B: 3 Can you help me move the bike there?
A: 4 Let’s hurry, or he will have left before we get there.
B: 5 Thank you very much!
A: You’re welcome.
A. No problem.
B. Yes, I’m afraid so.
C. No way.
D. I think that’s a good idea.
E. Certainly not.
F. You’re right.
7. 他把所有的业余时间都用来学习,从来不参加任何体育活动。(join in)