单选题He took ______ as to what he should do. A) his friends advise B) his friends advices C) an advice of his friend D) his friends advice

单选题She's already got her air ticket and will go to Canada ______.A. little by littleB. bit by bitC. by and byD. step by step

单选题Their first discharge of arrows, stones and two-headed darts which ______ any armour covered the ground.

单选题In two broad food categories the consumer actually shifted her trade up to the higher cost per unit item, in the cereal category she shifted to lower-cost packages.

单选题By______scientific rigor with a quantitative approach, researchers in the social sciences may often have______their scope to whose narrowly circumscribed topics that are well suited to quantitative methods.

单选题The most important______for assessment in this contest is originality of design. A. threshold B. partition C. warrant D. criterion

单选题Each student has to ______ a composition once a week．

单选题All 21 things must fight to stay alive. They have to feed on something and at the same time avoid being 22 . Therefore they have to solve this big problem of staying alive in their own way. The danger of being eaten in the sea is great. Those plants and animals that do survive usually 23 very fast and in great numbers. 24 sea animals have defensive devices which help them to survive. The jelly fish have 25 tentacles (触角) which are used for attack and defense. Another method of 26 which sea plants and animals use is disguise. They usually have the same 27 as their surroundings. In order to stay alive, animals need to have good senses. Fishes have sharp eyes. Almost all animals are sensitive to 28 . Fishes judge movements in the water by 29 of their lines. Fishes and other sea animals can hear well and many of them can 30 different types of warning sound.

单选题Many skiers ______ around the fire and drink hot chocolate in the evenings.(2003年中国社会科学院考博试题)

单选题Some people are color-blinded and cannot______between blue and green. A. distinguish B. differ C. separate D. divide

单选题The views of Michael Tenet and George Frank on globalization are

单选题I wish I could report a dazzling success but in fact it does not quite Ucome off/U. I don't think I may live up for my father's expectation.

单选题Happiness can be described as a positive mood and a pleasant state of mind. According to recent polls (民意测试), sixty to seventy percent of Americans consider themselves to be moderately happy and one in twenty persons feel very unhappy. Psychologists have been studying the factors that contribute to happiness. It is not predictable nor is a person in an apparently ideal situation necessarily happy. The ideal situation may have little to do with his actual feelings. A good education and income are usually considered necessary for happiness. Though both may contribute, they are only chief factors if the person is seriously undereducated or actually suffering from lack of physical needs. The rich are not likely to be happier than the middle-income group or even those with very low incomes. People with college educations are somewhat happier than those who did not graduate from high school, and it is believed that this is mainly because they have more opportunity to control their lives. Yet people with a high income and a college education may be less happy than those with the same income and no college education. Poor health does not rule out happiness except for the severely disabled or those in pain. Learning to cope with a health problem can contribute to happiness. Those with a good sex life are happier in general, but those who have a loving, affectionate relationship are happier than those who rely on sex alone. Love has a higher correlation with happiness than any other factors. It should be noted that people quickly get used to what they have, and they are happiest when they feel they are increasing their level no matter where it stands at a given time. Children whose parents were happily married have happier childhoods yet they are not necessarily happier adults when they grow up. The best formula for happiness is to be able to develop the ability to tolerate frustration, to have a personal involvement and commitment, and to develop self-confidence and self-esteem.

单选题It's a pity that some of the people{{U}} {{/U}} cannot come to the party.

单选题It is sometimes claimed that America is a ______ pot of different races. A. burning B. burnt C. melting D. melted

单选题It's true______her name is on the top of the list.

单选题Absorbed in her work, she was totally ______ her surroundings. A. liable for B. separated by C. oblivious of D. concerned about