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问题 名词解释

周期蛋白依赖性激酶（CDK）

答案

参考答案：

是与细胞周期进程相对应的一套Ser/Thr激酶系统。各种CDK沿细胞周期时相交替活化，磷酸化相应底物，使细胞周期事件有条不紊地进行下去。

2013年7月27日，是朝鲜战争停战协定签署60周年，美国、韩国和朝鲜都在以“史上最高”的层级和规模进行纪念。“朝鲜战争”在中国称为“抗美援朝战争”，下面对此战争的叙述不正确的是                                            

A．中国人民志愿军在朝鲜战场上发扬了高度的爱国主义精神和革命英雄主义精神

B．抗美援朝的胜利是中国一百多年来第一次取得完全胜利的民族解放战争

C．使新中国的国际威望空前提高

D．为中国的经济建设赢得了一个相对稳定的和平环境
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单项选择题

Approximately 5,000 people who have been convicted of nonviolent crimes in the state have been given community-service sentences instead of prison sentences. These offenders perform services commensurate with their training and skills, from scrubbing floors to conducting research for the state. The community-service program, which began in 1979, has grown immensely as a result of drunken-driver legislation enacted a few months ago.
The introduction of the community-service program in 1979 was most probably prompted by which of the following, all of which occurred during the 1970’s

A．A decrease in the number of violent crimes in the state.

B．An increase in the number of crimes committed by employees of the state.

C．A gradual decrease in the median age of judges in the state.

D．The overcrowding of prisons in the state.

E．(E) The passage of drunken-driver legislation in other states.
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