Although no one is certain why migration occurs, there are several theories. One theory claims that prehistoric birds of the Northern Hemisphere were forced south during the Ice Age. As the glaciers melted, the birds came back to their homelands, spent the summer, and then went south again as the ice advanced in winter. In time, the migration became a habit in spite of the disappearance of glaciers.
- Another theory proposes that the ancestral home of all modem birds was the tropics. When the region became overpopulated, many species were crowded north. During the summer, there was plenty of food, but during the winter, scarcity forced them to return t
- A more recent theory suggests a relationship between increasing daylight and the stimulation of certain glands (腺) in the birds' bodies that may prepare them for migration. One scientist has been able to cause midwinter migrations by exposing birds to art
- According to one theory, when the glaciers disappeared, birds ______.
- A.stopped migrating
- B.continued migrating
- C.stayed in the north
- D.migrated south and stayed there
-
Guest: ______.
Clerk: Certainly. Do you have a reservation?
Guest: Yes. The name is Morales. Mr. and Mrs. Morales.
Clerk: Here we are. For five nights. Could you fill in the registration card, please? And I'll need your credit card.
- A.I'd like rest here, please
- B.I'd like to rent a room, please
- C.I'd like to check in, please
- D.I'd like to stay in, please
-
Susan: I'm going to the cinema this evening.
Gordon: ______ ?
Susan: It's a Western: "Cowboy Comes Home".
- A.What's in
- B.What is actedC.What's on
- D.What is performed
-
Customer: ______ if you'd serve me as quickly as possible as I've got an appointment at two fifteen.
Waiter: I'll do my best, Madam.
- A.It would be very kind of you
- B.It would be very helpful
- C.I'd be most delightful
- D.I'd be most grateful
-
Conversation between two strangers at a party.
Chester: Hello, I'm Brian Chester. Let me get you some more to drink.
Jackson: Not at the moment, thank you.
- A.How do you do?
- B.How are you?
- C.I'm Andrew Jackson.
- D.I'm glad to meet you.
-
Guest: Have you a single room for tonight and tomorrow night with a telephone and shower?
Clerk: We haven't any rooms with a shower free just now, but there's a bathroom available on each floor.
Guest: ______
- A.Oh, sorry. Forget it
- B.How regretful! I give it up
- C.All fight. It does
- D.All fight. That'll do
-
Elizabeth (Treading on someone's foot. ): ______ . I hope I haven't hurt you.
Jordan: It's all fight.
- A.Oh, I'm sorry
- B.Oh, I'm regretful
- C.Oh, excuse me
- D.Oh, forgive me
-
Telephone enquiry Clerk: Lost property department. Can I help you?
Phone caller: ______ I left it on the "Margate Mermaid" when we cross from Olsten Yesterday morning.
- A.I want you help me find my lost camera.
- B.I wonder if you have a camera of mine.
- C.Do you think if you have a camera of mine?
- D.I doubt if you could help me find my lost camera.
-
Speaker A: Did you have a good crossing?
Speaker B: ______. It was really rough and I'm not a good sailor.
- A.No, I'm afraid not
- B.Yes, very pleasant crossing
- C.No, I hadn't
- D.Yes, it did
-
Bob: Can I help with your luggage?
Mary: ______
- A.No, thanks. I can manage it
- B.No, many thanks. I can do
- C.No, not necessary. Thank you anyway
- D.No, you needn't. Thank you anyway
-
Speaker A: Are you feeling better now?
Speaker B: ______
- A.Well, not too better yet, thank you
- B.Well, not too good yet. Better than I was though
- C.Well, it doesn't matter, I'm all right now
- D.Well, never, mind, I'm much better now
2005年初级经济师考试《旅游经济专
初级旅游经济师试题及答案一
初级旅游经济师试题及答案二
2005年初级经济师考试《邮电经济专
初级经济师试题及答案1(邮电经济)
初级经济师试题及答案1(保险经济)
初级经济师试题及答案2(邮电经济)
初级经济师试题及答案2(保险经济)
初级经济师试题及答案3(保险经济)
2014年经济师初级考试真题《建筑经