25. According to the air traffic rules, you ____ switch off your mobile phone before boarding.
A. may B. can C. would D. should
24.____ go abroad to have a further education, he works hard at English day and night.
A. Itch to B. Itching to C. Having an itch for D. Itch
23.The policeman’s attention was suddenly caught by a small box which ____ placed under the Minister’s car.
A. has been B. was being C. had been D. would be
22.Although he is a teenager, Fred could resist ____ what to do and what not to do.
A. telling B. Being told C. to tell D. to be told
第一節(jié):單項填空(共15小題;每小題1分,滿分15分。)
從A、B、C、D四個選項中,選出可以填入空白處的最佳選項。
21.In the United States, there is always ____ flow of people to areas of ____ country where more jobs can be found.
A. a; the B. the; a C. the; the D. a; a
第二節(jié):(共15小題;每小題1.5分,滿分22.5分)
聽下面五段對話或獨白,選出最佳選項,每段對話或獨白讀兩遍。
請聽下面一段材料,回答第6至8題。
6. What is the main topic of the conversation?
A. Friends. B. Seabirds. C. A trip.
7. Why does the woman like going to the beach?
A. Because she wants to sit in the sun.
B. Because she is fond of watching the waves.
C. Because she enjoys observing seabirds.
8. What do they plan to meet again?
A. On Saturday. B. One year later. C. On Friday.
請聽下面一段材料,回答第9至11題。
9. Where are the two speakers?
A. On a bus. B. In the shopping district. C. At a street corner.
10. What’s the largest building on the left?
A. The bank. B. The city hall. C. The department store.
11. What the man need?
A. Clothing. B. Shoes. C. Cigarettes.
請聽下面一段材料,回答第12至14題。
12. What happened when the man was climbing mountains?
A. He got trapped in a cave. B. He got lost in bad weather.
C. He lost his equipment and food.
13. What caused the loss of the man’s legs?
A. Low temperature. B. A bad fall in the mountain.
C. An unsuccessful operation.
14.What did the man decide to do after losing his legs?
A. Design new climbing shoes. B. Set up a club for the disabled.
C. Use technology to fight his disability.
請聽下面一段材料,回答第15至16題。
15. What did the young man try to do?
A. To get the old man’s bag. B. To help the old man up.
C. To collect his money.
16. Who is the woman speaking to?
A. A manager. B. A customer. C. A policeman.
請聽下面一段材料,回答第17至20題。
17. How many librarians are in charge of the library?
A. One. B. Two. C. Three.
18. What’s the passage mainly about?
A. The duties of the librarian. B. The rules of the library.
C. The length of the students’ borrowing books.
19. How many books can a student borrow at a time?
A. Two. B. Three. C. Four.
20. Which the following is NOT true of the rules for rules for good behavior in the library?
A. The students ought to keep quiet in the library.
B.. The students should keep the books in good condition.
C. The students can keep the books as long as they like.
第一節(jié):(共5小題;每小題1.5分,滿分7.5分)
聽下面5段對話,選出最佳選項,每段對話僅讀一遍。
1. How is the woman going to the airport?
A. By taxi. B. By train. C. By bus.
2. What is the woman’s favorite free-time activity ?
A. Watching TV. B. Reading a book. C. Listening to music.
3. What does the man mean?
A. It will take him a long time to help the woman.
B. He can help her for a while.
C. It won’t take a long time for him to help her.
4. Where does the conversation most probably take place?
A. In a plane. B. In a coffee shop. C. In a restaurant.
5. Why couldn’t the man get through?
A. The woman’s telephone was out of order.
B. The woman’s receiver wasn’t put in the right place.
C. The receiver of the telephone was broken.
45.(8分)生態(tài)系統(tǒng)的成分包括非生物的物質和能量、生產(chǎn)者、消費者、分解者四部分,其中非生物的物質和能量(如光),生產(chǎn)者、分解者三部分在生態(tài)系統(tǒng)中占有非常重要的地位.為了驗證這三部分與消費者的關系及重要性,現(xiàn)向你提供如下實驗材料(假設材料用具充足):
廣口瓶、凡士林、涼開水、河水、黑藻、小魚、燈光等.
你如何設計小生態(tài)瓶的相互對照實驗,證明生產(chǎn)者、分解者和消費者(小魚)存活(時間)所必需的.
⑴你的實驗設計步驟是:
①取4只等大的廣口瓶,分別編號為1、2、3、4.
② .
③ .
④ .
⑤ .
⑵你的記錄表格是:
廣西桂林十八中08-09學年高二下學期期中考試
44.(12分)
甲、乙兩個水池中各有由5個物種構成的食物網(wǎng),如圖所示,且這兩個水池的生態(tài)系統(tǒng)在沒有人為干擾的情況下均達到相對穩(wěn)定平衡狀態(tài)。請據(jù)圖回答:
(1)每個水池生態(tài)系統(tǒng)中有 條食物鏈。
(2)假如鯽魚的1/4食物來自綠藻,1/2來自輪蟲,且該系統(tǒng)能量從生產(chǎn)者到消費者的傳遞效率為10%,從消費者到消費者的能量傳遞效率為20%。如果鯽魚種群增加的能量200KJ,那么其中來自綠藻是
KJ。
(3)為增加甲水池生態(tài)系統(tǒng)的多樣性,向池中引種了大量浮萍,一段時間后,水面長滿了浮萍,水草、綠藻和輪蟲相繼死亡。水草死亡的最主要原因是缺少 ,輪蟲死亡的主要原因是缺少 。此時,該水池中食物鏈只剩下2條,請畫出這兩條食物鏈構成的食物網(wǎng)。
(4)為促進食物鏈的增加,乙池中加入了較多的有機肥,一段時間后,池中綠藻爆發(fā),其他4種生物陸續(xù)死亡,水體發(fā)臭。導致水體發(fā)臭的生物因素是 。
43.
(6分)下圖中甲圖表示一個海灘濕地生態(tài)系統(tǒng)中部分生物的食物關系。請據(jù)圖回答問題。
(1)在該生態(tài)系統(tǒng)中,既是分解者又可作為消費者食物的生物是 。
(2)請根據(jù)甲圖中的生態(tài)系統(tǒng),寫出乙圖中能量金字塔各營養(yǎng)級的所有生物名稱:① ;② ;③ 。
(3)有人研究該生態(tài)系統(tǒng)中食草蟲個體存活數(shù)與發(fā)育期的關系,結果如丙圖。從中可推知食草蟲死亡率最大的時期是 。
(4)沼蟹會破壞大米草根系,土壤中的磷可促進藻類生長。若在食草蟲幼蟲期噴灑只殺滅該蟲的含磷殺蟲劑,則蜘蛛數(shù)量將 。
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