单选题Europe as a ______ unit did little by itself; it either sent for US help, or each European government acted on its own.

单选题The mail was_____for two days because of the snowstorm.

单选题"I must have eaten something wrong. I feel like ______ We told you not to eat at a restaurant. You'd better ______ at home when you are not in the shape."

单选题It is a general belief in American society that Asian or Asian-American parents are able to instill into their children a much greater {{U}}incentive{{/U}} to work.

单选题Among other things the Town Council is responsible for parks, fire services, ______ collection and libraries. A. refuse B. plague C. robbery D. insect

单选题The {{U}}plainer{{/U}} is a bowerbird's plumage, the more brightly it decorates its nest to attract a mate.

单选题Here the burden of his thought is that the philosopher ,aiming at truth,must not ____the seduction of trying to write beautifully.

单选题Monday's earthquake______windows and woke residents.

单选题His tick convinced none but the most ______.

单选题When a society is polarized, the ______ Left confronts the extreme Right and there's nobody in between.

单选题Within these main areas of research, the staff of the department are prepared to ______ suit- ably qualified students for research degrees at an M. Ph. or Ph. D. level.

单选题The candidate realized that he was handicapped by his age.

单选题I was______ in the middle of my call because I had no more pennies to put in the box.

单选题For many people, overeating and overspending are as ______ to Christmas as candles and holly. A. integral B. suitable C. inevitable D. compatible

单选题The doctor warned him that his ______ nature made him susceptible to a stroke and urged him to curb his temper. A. chronic B. illusory C. choleric D. candid

单选题Apple pie is ______ neither good nor bad; it is the way it is used that determines its value. A. at itself B. as itself C. on itself D. in itself

单选题Most people are right-handed and children usually have the same handedness as their parents. This suggests that genes are at work. But identical twins have identical genes, so genes cannot be the whole story. Cultural attitudes seem to have played an important part in the development of hand preferences. In the past, left-handed have suffered anything from teasing to flogging. Even today in some countries en forced right-handedness, particularly for writing and eating, is still common. To explain the observed patterns of handedness, researchers have devised what is known as a' geneculture coevolution' model. The initial assumption of the model-drawn from observation of non-human primates and other mammals such as mice-is that early on in human evolution, the genetic make-up of individuals inclined them to prefer one hand or the other, but that the population was equally divided between right and left-handed people. Over time, according to the model, the interaction of genes and culture has produced a state where everyone has identical genes for handedness. This would happen if, for whatever reason, right-handers were more likely to survive and reproduce. The idea may not be that far fetched. Many biologists believe that handedness is related to brain structure, say, for example, early right-handers may have been better at language. The model predicts that today everyone has genes which confer a basic predisposition of 78% to be right-handed. How children actually turn out, however, can be influenced by whether their parents are dextral or sinistral. For example, children may mimic their parents. Or parents may influence the handedness of their children in the way that they hand them toys or food. The researchers reckon that a child with two right-handed parents has a 91% probability of being right-handed; a child with two left-handed parents has a probability of only 63% of being right-handed. But parental influence does not account for everything. Random events during a child's development can also have a small effect on handedness. Even if identical twins have parents who are both dextral, factors such as their position in the womb may result in the twins not preferring the same hands. The model seems plausible. It accurately predicts the results of 13 studies of the handedness of twins as well as the proportion of left-handers found in the population at large (roughly 12%, a figure that seems to be quite stable). Asymmetries in early tools, and in the way in which prey were clubbed, suggest that hominids as early as the Australopithecines may have preferred their right hands. Whatever the origin of this dexterous preference, though, left-handers remain at large. Some people are just sinister.

单选题To please no one A I will prescribe a deadly drug, B nor give advice which may cause his death. C Nor will I give D a woman a pessary to procure abortion. But I will preserve the purity of my life and my art.