Women’s minds work differently from men’s. At least, that is what most men are convinced of. Psychologists view the subject either as a matter or frustration or a joke. Now the biologists have moved into this minefield, and some of them have found that there are real differences between the brains of men and women. But being different, they point out hurriedly, is not the same as being better or worse.
There is, however, a definite structural variation between the male and female brain. The difference is in a part of the brain that is used in the most complex intellectual processes—the link between the two halves of the brain.
The two halves are linked by a trunkline of between 200 and 300 million nerves, the corpus callosum. Scientists have found quite recently that the corpus callosum in women is always larger and probably richer in nerve fibers than it is in men. This is the first time that a structural difference has been found between the br
A. To outline the research findings on the brain structure.
B. To explain the link between sex and brain structure.
C. To discuss the various factors that cause brain differences.
D. To suggest new areas in brain research.
Most people who travel long distances complain of jetlag(时差反应). Jetlag makes business travelers less productive (对产的，有成效的) and more prone (51) making mistakes. It is actually caused by (52) of your "body clock"-a small cluster(串、组、群)of brain cells that controls the timing of biological (53) . The body clock is designed for a regular rhythm(节奏)of daylight and darkness, so that it is thrown out of balance when it experiences daylight and darkness at the "wrong" times in a new time zone. The (54) of jetlag often persist(持续) for days (55) the internal body clock slowly adjusts to the new time zone.
Now a new anti-jetlag system is available that is based on proven, (56) and pioneering scientific research. Dr. Martin Moore has devised a practical strategy to adjust the body clock much sooner to the new time zone (57) controlled
A. rupture
B. corruption
C. eruption
D. disruption
At the moment the second plane was slamming into the south tower, President Bush was (1) to the second-graders of Emma E. Booker Elementary in Sarasota FTA. When he arrived at the school he had been whisked (2) a holding room: National Security Advisor Condoleezza Rice needed to (3) to him. But he soon appeared in the classroom and listened (4) as the children went through their reading drill. As he was getting ready to pose (5) pictures with the teachers and kids, chief of staff Andy Card entered the room, walked (6) to the President and whispered in Ms right ear. The President’s face became (7) tense and serious. (8) nodded, Card left and for several minutes the President seemed distracted and somber but then he (9) his interaction with the class. "Really good readers, whew !" he told (10) "These must be six-graders !"
Meanwhile, in the room (11) Bush was scheduled to
A. appreciatively
B. attentively.
C. happily
D. absent-mindedly
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