单选题Some African Americans have had a profound impact on American society, changing many people"s views on race, history and politics. The following is a sampling of African Americans who have shaped society and the world with their spirit and their ideals. Muhammad Ali Cassius Marcellus Clay grew up a devout Baptist in Louisville, Kentucky, learning to fight at age 12 after a police officer suggested he learn to defend himself. Six years later, he was an Olympic boxing champion, going on to win three world heavyweight titles. He became known as much for his swagger (趾高气扬) outside the ring as his movement in it, converting to Islam in 1965, changing his name to Muhammad Ali and refusing to join the U.S. Army on religious grounds. Ali remained popular after his athletic career ended and he developed Parkinson"s disease, even lighting the Olympic torch at the 1996 Atlanta Olympics and conveying the peaceful virtues of Islam following the September 11 terrorist attacks. W. E. B. Du Bois Born William Edward Burghardt Du Bois in 1868, this Massachusetts native was one of the most prominent, prolific intellectuals of his time. An academic, activist and historian, Du Bois co-founded the National Association for the Advancement of Colored People (NAACP), edited "The Crisis" magazine and wrote 17 books, four journals and many other scholarly articles. In perhaps his most famous work, "The Souls of Black Folk", published in 1903, he predicted "the problem of 20th century [would be] the problem of the color-line". Martin Luther King Jr. The Rev. Martin Luther King Jr. is considered one of the most powerful and popular leaders of the American civil rights movement. He spearheaded (带头,作先 锋)a massive, nonviolent initiative of marches, sit-ins, boycotts and demonstrations that profoundly affected Americans" attitudes toward race relations. He was awarded the Nobel Peace Prize in 1964. Malcolm X Black leader Malcolm X spoke out about the concepts of race pride and black nationalism in the early 1960s. He denounced the exploitation of black people by whites and developed a large and dedicated following, which continued even after his death in 1965. Interest in the leader surged again after Spike Lee"s 1992 movie "Malcolm X" was released. Jackie Robinson In 1947, Jackie Robinson broke the color barrier by joining the Brooklyn Dodgers, becoming the first black baseball player in the U.S. major leagues. After retirement from baseball in 1957, he remained active in civil rights and youth activities. In 1962, he became the first African-American to be inducted into the Baseball Hall of Fame.

单选题Peter took the ______ in clearing up the mess, and the other boys followed his example.

单选题When the pacific War broke out, Edward was {{U}}drafted{{/U}} by navy and served four full years on a big aircraft carrier.

单选题The boy had a{{U}} violent {{/U}}pain in his stomach after eating too much ice-cream.

单选题The each {{U}}revolves {{/U}}both round the sun and on its own axis.

单选题Before the disastrous earthquake there was ______ chaos.

单选题His classes were packed and students, responding to the warmth of his personality and the ______of his lectures, would cluster round him before and after the class to bombard him with questions.

单选题You could be ______ many dangers by traveling alone in that area. A. subject to B. immune to C. sensitive to D. resistant to

单选题William never lends himself to ______ at cards.

单选题Her office in the First National Bank building is provisional .

单选题He always has a lot of______ ideas in his mind, and sometimes we do not even know what he is thinking about.(2011年南京师范大学考博试题)

单选题The qualities of my home town, ______ on me as a boy, had a profound effect on the philosophy that directed my career.

单选题This crop does not do well in soils______the one for which it has been speciaIly developed.

单选题______all living things have some way of getting from here to there.

单选题The lady dressed in the latest Paris fashion is ______ in her appearance but rude in her speech.

单选题Obesity generally is defined as an accumulation of fat(adipose tissue) beyond what is considered normal for a person's age, sex, and body type. In today's society obesity is considered as a disease, not a moral failing. It occurs when energy intake exceeds the amount of energy expended over time. Only in a small minority of cases is obesity caused by such illnesses as hypothyroidism, or the result of taking medications, such as steroids, that can cause weight gain. The more a person weighs, the more blood vessels the body needs to circulate blood throughout the body. The heart takes on a heavy burden as it has to pump harder to force the blood flow through so many vessels, As a result, the heart grows in size and blood pressure tends to rise. Obesity is also a factor in osteoarthritis (because of the extra weight placed on joints), gout, bone and joint diseases(including ruptured intervertebral discs), varicose veins, respiratory ailments; gallbladder disease, complications during pregnancy and delivery, and higher accidental death rate. Obesity can alter hormone levels, affect immune function, and cause impotence in men and reproductive problems in women. Women who are 30% overweight are twice as likely to die of endometrial cancer, and those who are 40% overweight have four times the risk. Obese women also are more likely to incur cancers of the breast, cervix, ovaries, and gallbladder. Obese men are more likely to develop cancers of the rectum, colon, esophagus, bladder, pancreas, stomach, and prostate. Obesity can also cause psychological problems. Sufferers are associated with laziness, failure, or inadequate willpower. As a result, overweight men and women blame themselves for being heavy, thus causing feelings of guilt and depression. Scientific evidence has found an association between MBI(body-mass index) and higher death rates. However, the relative risk of being heavy declines with age. Some researchers have found that data linking overweight and death are inconclusive, while other researchers have found that losing weight may be riskier than dangers posed by extra pounds. Some researchers counter that overweight indirectly contributes to over 300,000 deaths a year. A poll by Shape Up America found that 78% of overweight or obese adults have abandoned dieting as a means of losing weight. Diets do not teach people how to eat properly. They merely restrict food intake temporarily, so when the diet ends, weight gain r

单选题There were ______.

单选题Precise calculations are ______.