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【单选题】
Social and Cultural Changes of America An economics professor from the United States was teaching in Britain in the early Nineteen-Eighties. One of his students asked this question, 'What is most important to Americans these days?' He said, 'Earning money.' Clearly, his answer was far too simple. Still, many observers would agree that great numbers of Americans in the Nineteen-Eighties were concerned with money. These people wanted the good life that they believed money could buy. In some ways, the Nineteen-Eighties were the opposite of the Nineteen-Sixties. The Nineteen-Sixties were years of protest and reform. Young Americans demonstrated against the Vietnam War. African Americans demonstrated for civil rights. Women demonstrated for equal treatment. For many, society's hero was the person who helped others. For many in the Nineteen-Eighties, society's hero was the person who helped himself. Success seemed to be measured only by how much money a person made. The period of change came during the Nineteen-Seventies. For a while, these years remained tied to the social experiments and struggles of the Nineteen-Sixties. Then they showed signs of what American would be like in the Nineteen-Eighties. There were a number of reasons for the change. One reason was that the United States ended its military involvement in Vietnam. Another was that the civil rights movement and women's movements reached many of their goals. A third reason was the economy. During the Nineteen-Seventies, the United States suffered an economic recession. Interest rates and inflation were high. There was a shortage of imported oil. As the Nineteen-Seventies moved toward the Nineteen-Eighties, Americans became tired of social struggle. They became tired of losing money. They had been working together for common interests. Now, many wanted to spend more time on their own personal interests. This change appeared in many popular American society. It affected popular culture, education, and politics. For example, one of the most popular television programs of that time was about serious social issues. It was called 'All in the Family'. It was about a factory worker who hates black people and opposes equal rights for women. His family slowly helps him to accept and value different kinds of people. Other television programs, however, were beginning to present an escape from serious is sues, These included 'Happy Days' and 'Three's Company.' Music showed the change, too. In the Nineteen-Sixties, folk music was very popular. Many folk songs were about social problems. In the Nineteen-Seventies, groups played hard rock and punk music, instead. Self-help books were another sign that Americans were becoming more concerned about their own lives. These books described ways to make people happier with themselves. One of the most popular was called 'I'm Okay, You're Okay'. It was published in Nineteen-Sixty Nine. It led the way for many similar books throughout the Nineteen-Seventies. The Nineteen-Seventies also saw a change in education. In the Nineteen-Sixties, many young people expressed little interest in continuing their education after four years of study in college. They were busy working for social reforms. Many believed that more education only created unequal classes of people. By the middle Nineteen-Seventies, however, more young people decided it was acceptable to make a lot of money. Higher education was a way to get the skills to do this. Law schools and medical schools soon had long lists of students waiting to get in. Politically, the United States went through several changes during the Nineteen-Seventies. There were liberal Democratic administrations for most of the Nineteen-Sixties. Then a conservative Republican, Rich
A.
Y
B.
N
C.
NG
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【单选题】下列有关慢性炎症的描述哪项是错误的()
A.
有上皮等实质细胞增生
B.
都有炎性肉芽肿形成
C.
可形成瘤样肿块
D.
可形成多发性息肉
【单选题】写给个人的信函要尽量使用( )。
A.
书面语
B.
修辞
C.
口语
D.
复句
【判断题】药物的LD50数值越大,则其毒性越大。
A.
正确
B.
错误
【单选题】设幂级数 收敛半径为R, ,则 的收敛半径是
A.
2R
B.
C.
R
【单选题】药物的LD50值与与药物毒性之间的关系是
A.
LD50越小,越容易发生过敏反应
B.
LD50越大,越容易发生毒性反应
C.
LD50越小,毒性越小
D.
LD50越大,毒性越小
E.
LD50越大,毒性越大
【判断题】人类与结核病的斗争即将结束,因为我们已经拥有了各种抗结核病药。
A.
正确
B.
错误
【单选题】事件が 起こって、警察官は休む暇もない。
A.
次々と
B.
刻々と
C.
だんだん
D.
順々に
【判断题】预封可防止罐头由排气箱送至封罐机时顶隙温度的降低。生产玻璃罐装食品时,也需要进行预封。
A.
正确
B.
错误
【简答题】设幂级数与的收敛半径分别是R1与R2,则幂级数的收敛半径R3=min{R1,R2}.这种说法对吗?‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ ‍ 设幂级数 ‍ ‍ ∞∑(n=0) ‍ ‍ a(n)x^n=S(x)与∞∑(n=0)b(n)x^n=T(x)的收敛半径分别是R1与R2,则幂级数 的收敛半径R3=min{R1,R2}.这种说法对吗? ‍ ‍ ‍ ‍ ‍
【单选题】事件が( )起こって、警察官は休む暇もない。
A.
刻々と
B.
順々と
C.
次々と
D.
一つ一つ
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