简析产生妨碍时间的几种主要情况。
参考答案：
（1）客车妨碍：旅客（通勤）列车横切峰前到达场出口咽喉妨碍驼峰调车机车分解车列；
（2）反接妨碍：到达场出口咽喉反驼峰方向接改编列车妨碍驼峰调车机车分解车列；
（3）挂机妨碍：改编列车自到达场入口咽喉到达妨碍驼峰调车机车连挂车列而延误驼峰分解车列的时间；
（4）机车妨碍：在到达场出口咽喉处，本务机车入段妨碍驼峰调机推峰解体。
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were tested for a wide range of personality traits (特征). In terms of happiness-1______ as the ability to enjoy life-twins who were separated soon after birth were much less alike than twins raised together. But when it comes to unhappiness, the twins raised apart-some without contact for as long as 64 years-were as 2______ as those who had grown up together. Why is unhappiness less influenced by 3______? When we're happy we are more responsive to people and keep up 4______ better than when we' re feeling sad. This doesn't mean, however, that some people are born to be sad and that' s that. Unhappiness may be related to genes, but this inherited trait can be influenced by 5______ choice. You can increase your happiness through your own actions. In a whole 6______ of experiments by psychologists John Reich and Alex Zautra at Arizona State University, they asked students to select their favorite activities from a list of everyday pleasures- things like going to a movie, talking with friends and playing cards. Then the researchers 7______ some of the students in the experiment to increase the number of favorite activities they participated in for one month (the other participants in the study 8______ as controls (对照组) and did not vary their activity level). Result: Those who did more of the things they enjoyed were happier than those who didn't. The conclusion, then, is that the pleasure we get from life is 9______ ourselves to control. |