单项选择题 如果一份肯德鸡的边际效用为3，一件金利来衬衫的边际效用为20，当二者的价格分别为15元和150元时，消费者的消费行为应该是（ ）。 A. 增加衬衫或减少肯德鸡的消费 B. 增加肯德鸡或减少衬衫的消费 C. 同时增加或减少二者的消费 D. 对二者的消费量不变

未知题型 In the sentence 'The manager interviewed Jim himself in the morning', the italicized work is used to modify______.A.the objectB.the verbC.the subjectD.the prepositional phrase

未知题型 John is up to his eyes in work at the moment. The underlined word means______.A.very excitedB.very busyC.very tiredD.very efficient

未知题型 'Look at those pretty girls' skirts' is ______, because it is not clear whether the girls or the skirts are 'pretty'.A.ambiguousB.hiddenC.indirectD.indistinct

单项选择题 图示简支梁受到集中力作用（l = a+b），下列结论错误的是（  ）。

未知题型 Why does the author say 'spring cleaning can't wait'?A.Because there will be more activities when it gets warmerB.Because the air is fresher and the breeze is lighter.C.Because the whole family is full of energy at spring timE.D.Because the snow is melting and the ground is thawing.

未知题型 'Harrington... made sure she was never off executives' radar' (Paragraph Four) means that she______.A.herself wanted to be a company executiveB.meant to hire executives to run the businessC.meant to keep her management knowledge and skillsD.focused on the management of the bakery business

未知题型 According to the passage, which of the following is fundamental to Harrington's success?A.Perseverance and concern for employees.B.Business expansion and family support.C.Efficiency and love for the family.D.Opportunities and speeD.

未知题型 听力原文：W: Well, Mr. Smith, we have had an interesting discussion about your work. Now, tell us something about your after work activities.M: I guess not much different from everyone elsE.I'm interested in sport, and I run about three miles every day. I particularly enjoy cross-country running, where you have to run across fields, jump over streams and so on While I'm running I think about all sorts of things, and at the end of a run I'm sometimes surprised to find that I've managed to solve a problem that was on my minD.Next year I'm going to try the London Marathon. It's a long, hard race--26 miles, or 42 kilometers--and you have to be tough to finish, but I very much want to do it. I worry a bit about getting old, and I'd like to prove to myself that I'm still almost as fit as I was twenty years ago.I'm interested in climbing as well as running. I'll never become an expert climber, but I know what I'm doing in the mountains. I successfully completed a course in snow and ice climbing when I was younger, and I've done a series of easy climbs in the Alps during the last few years. My wife doesn't share my interest in Mountains. She agreed to go climbing with me once, but she found that she felt iii as soon as she got above 1,000 meters, so we decide to follow different hobbies.W: You certainly seem to enjoy various types of recreation. All right, Mr. Smith. Thanks for your interesting talk.What are the man's hobbies?A.Running and thinking.B.Running and jumping.C.Running and climbing.D.Running and skiing.

未知题型 What is the speaker's main topic?A.Training for a professional athletE.B.His ways of physical training.C.How to do cross country running.D.How to do mountain climbing.