多项选择题

隔姜灸可以治疗的病症有()

A.呕吐
B.泄泻
C.风湿湿痹
D.腹痛
E.痛经

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单项选择题

阅读理解题为6-10题，请按顺序作答。阅读理解： Directions：Read the following passages carefully. Each passage is followed by some questions or unfinished sentences. For each of them there are four choices marked A, B, C, and D.Choose the best answer to each question. Playing violent video games can have immediate and lasting effects on a person’s thoughts and behavior, a new research shows. In fact, researchers report that the interactive and increasingly descriptive nature of some video games makes them “potentially more dangerous” than violence-charged television and movies. Psychologists Anderson and Dill conducted two studies. In one study of 227 college students, the investigators found that students who more frequently played violent video games during junior high and high school were more likely to have engaged in “aggressive behavior”. A second study in which 210 college students played either a violent or non-violent video game revealed that the violence-packed game increased subjects’ aggression immediately afterwarD. In the first study, the investigators questioned students on their natural levels of aggression and irritability (易怒性), and their delinquent (犯法的) behavior. – for instance, whether they had hit other students in the past year. The investigators found that students with aggressive personalities and those who more often played violent video games were more likely to show real-life aggression. Students who considered themselves aggressive were also more likely to play violent video games. Since aggressive people may seek out violent games, coming to the conclusion that the video games caused real-life delinquency is too risky. However, the second study linked video-game violence with immediate increases in aggression. Anderson and Dill had students play either a violent game or a non-violent game, and let the students believe they were playing against an opponent in another room. After completing the video game, participants played a competitive-reaction game with their imaginary opponents (对手); in this game the winner was allowed to punish the loser with loud sounds. The researchers found that students who were fresh from the violent video game gave their opponents loud sounds longer than those who played the non-violent gamE. Because video games show short-term and long-term effects, Anderson and Dill suppose that video-game violence influences behavior. not by arousing aggressive feelings, but by teaching players to find “aggressive solutions” to problems. Unlike TV, many video games demand that players identify with the aggressor and actively participate in violencE.According to the passage, why may violent video games be more dangerous than violent movies or TV programs?A、Because video games require active involvement in violence of the players.B、Because video games stimulate aggressive feelings more easily.C、Because video games tend to have lasting effects on one’s behavior.D、Because video games can have immediate effects on one’s thoughts.

A.
B、Because
B.
C、Because
C.
D、Because

单项选择题

甲烷氯代的决速步骤是：

A、产生甲基自由基的一步
B、氯分子均裂为氯自由基的一步
C、氯自由基与甲基自由基结合的一步
D、甲基自由基相互结合的一步