单选题Things went well for her during her early life but in her middle age her ______ seemed to change.

单选题China Unot only will/U endeavor to curb its population growth, Ubut will also/U upgrade the education of its citizens.

单选题 When you first drift off into slumber, your eyes will roll about a bit, your temperature will drop slightly, your muscles will relax, and your breathing will become quite regular. Your brain waves slow down a bit, with the alpha rhythm predominating for the first few minutes. This is the first stage of sleep. For the next 30 minutes or so, you will drift down through Stage 2 and Stage 3. The lower your stage of sleep, the slower your brain waves will be. About 40-60 minutes after you lose consciousness, you will reach the last stage. Your brain waves will show the delta rhythm. You may think that you stay at this deep stage all the rest of the night, but that turns out not to be the case. About 80 minutes after you fall into slumber, your activity cycle will increase slightly. The delta rhythm will disappear, to be replaced by the activity pattern of brain waves. Your eyes will begin to dart around under your closed eyelids. This period of Rapid Eye Movements lasts for 8-15 minutes and is called REM sleep. During both light and deep sleep, the muscles in your body are relaxed but capable of movement. As you slip into REM sleep, a very odd thing occurs -- most of the voluntary muscles in your body become paralyzed. Although your brain shows very rapid bursts of neural activity during REM sleep, your body is incapable of moving. REM sleep is accompanied by extensive muscular inhibition.

单选题The author refers to the ocean bottom as a "frontier" in Paragraph 1 because it ______.

单选题Only hotel guests have the______of using the private beach.

单选题The mother says that her daughter would be frightened to death if the door of the house is left opened .

单选题Construction is expanding all over China, no doubt many materials will be needed at a very big amount in future.

单选题The reporter compares a husband to a particularly tricky musical instrument, one that a wife must learn to play ______ her advantage.

单选题Bank notes are not usually ______ into gold nowadays.

单选题We must ______ the train being late for the reason that it always is.

单选题When I was an editor, I always preferred to apologise promptly, what the merits of the case, rather than face the expense and, importantly, the time consuming complexities and debilitating worry of litigation, libel being one of the least satisfactory branches of the law. A. whichever, more importantly B. whatever, more important C. whichever, more important D. whatever, more importantly

单选题Chimpanzees are frequently used as stand-ins for human beings in experiment. A. partners B. role-models C. stand-bys D. substitute

单选题The mother is told that her child is desperately ill—the chances of survival are slim, and the treatment is as dreadful as the disease.

单选题AIDS is causing great public concern because the ______ fatal disease hits primarily young people. A. invariably B. imperatively C. transiently D. deceptively

单选题In Nathaniel Hawthorne''s The Scarlet Letter, Reverend Dimmesdale succumbed to Hester''s charms.

单选题Having finished lunch, the case was discussed .

单选题The student was rebuked for playing pranks during the class.

单选题What do you think "large corvines" probably are?

单选题Many researchers have found greater dependence and obedience in very young girls, greater autonomy and activity in boys. When a barrier is set up to separate children from their mothers, boys try to knock it down; girls cry helplessly. There is little doubt that mother's encouragement or discouragement—of such behavior plays a major role in determining adult personality. For example, a mother often stimulates male autonomy by throwing a toy far away from her young son, thus silently suggesting to him that he leaves her to get it. Animal studies suggest that there may be a biological factor in material behavior; mothers of some monkeys punish their male babies earlier and more often than their female offspring; they also touch their female babies more often and act more protectively toward them. As for the controversial question of female "passivity", psychologist Helen Deutsh believes that the concept has been misunderstood. "There is no contradiction between being feminine and working. The self can be active in both men and women," she says. It is only in love and sex that passivity is particularly appropriate for women. As she sees it, passivity is no more than a king of openness and warmth; it does not mean "inactivity of emptiness". Another controversy ranges over the effect of hormones. Aggressive women; who discount hormonal influence, disagree violently with scientific researchers, who almost unanimously agree that hormones help determine how people feel and act. So far, there have been few studies of male hormones, but scientists think they may eventually discover hormonal cycles in men that produce cyclic changes in mood and behavior. As for females, studies have indicated that 49 percent of female medical and surgical admissions, most psychiatric hospital admission and 62 percent of violent crimes among women prisoners are related with hormonal cycles in women.

单选题Arrogance and pride are similar in meaning, but there is a (n) ______ difference between them.