Refer to Figure 12.1. Assume the firms have formed a cartel. If the cartel is maximizing profits, the cartel's profits are:

A、in proportion to B、in reply to C、in relation to D、in contrast to

A . Students B . Conditions C . Undocumented immigrants D . Public colleges and universities

A . The feature of a forms application enabling it to run both in client-server mode and on the Web.  B . Storing PL/SQL program units between the Oracle server and the application to make optimal use of available resources.  C . The nature of a three-tier architecture, where the form module and processing software reside on an application server.  D . The feature of a forms application that is able to use Ethernet, twisted pair, and wireless data connections.

A . be a stopper B . shorten a line C . join lines of equal size D . keep a line from passing through a sheave

A . operation B . construction C . introductio

M: He's had a terrible time with his wife. But it has something to do with his parents. Q: What conclusion can you draw from the conversation？ (19) A．He has some trouble with his parents. B．His parents had a quarrel. C．He and his wife might have had a quarrel. D．His wife and his parents might have disagreed with each other.

A．come out B．set out C．take out D．figure out

Researchers have learned that the slapping noise pigeons make when they suddenly take off is the sound of super charged lift. They call it the "clap fling" effect. Here at SRI International scientists try to duplicate the pigeons' thrust. A flashing strobe reveals the secret. Scott Stanford, a scientist at SRI, says, You re looking at the clap fling effect, where the two wings will come together and peel apart 【C2】______ each other, thus augmenting lift 【C3】______ drawing air from the top to the bottom. " This mechanical bug won't get off the ground. 【C4】______ its flapping wings demonstrate a potential propulsion system for robotic birds: man-made rubbery muscle. Roy Kornbluh works at SRI. "There, I'm turning the voltage on and off, and you can see when the voltage is on, the material is larger 【C5】______ when the voltage is off." Super computers show high-speed airflows over supersonic aircraft. But scientists have only begun to see how air flows 【C6】______ really low speeds. Professor Max Platzer of the Naval Postgraduate School, says, "The flapping wing is generating a thrust, this way, this is the basic physics of the phenomenon." It's pelicans--not pigeons--the Navy is looking at. The Navy is looking at the smooth easy flight of pelicans low over water--called "ground effect." Researchers at the Naval Postgraduate School are trying to imitate the pelican's efficiency. Assistant Professor Kevin Jones of the Naval Postgraduate School says, " 【C7】______ flapping the wings, symmetrically, we're 【C8】______ effect imitating ground effect. We now have the same feature a bird sees when it's flying, over a ground plane." An electric motor drives the flapping wings. Researchers here are working 【C9】______ ways to beam power to the tiny bird. David Jenn of the Naval Postgraduate School says, "There's no battery inside of here, so we're going to set this inside the radar beam, and the energy is extracted from the radar beam and will be used to propel the motor." Scientists are learning it's one thing to build an airplane, 【C10】______ quite another to build a bird. 【C1】______

A．make off B．make up C．make out D．make over

A．A square pipe. B．A kind of computer. C．A square office. D．An office desk.

A．guess B．sum up C．understand D．summarize

A．a few corrupt individuals hurting a team or an organization B．systematic practices that bring an organization off course C．the failure in discovering objective scientific truths D．research errors resulted from violation of scientific methods

A．different cultures B．different languages C．different goals D．different religions

A．dismay B．athleti C．whirl D．throw

A．alliteration B．parallelism C．polyptoton D．homeoteleuton

A．Uncertainty B．Doubt C．Certainty D．Skepticism