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" You can use me as a last resort ( 选择 ) , and if nobody else volunteers , then I will do it. " This was an actual reply from a parent after I put out a request for volunteers for my kids ' lacrosse ( 长曲棍球 ) club. I guess that there's probably some demanding work schedule, or social anxiety around stepping up to help for an unknown sport. She may just need a little persuading. So I try again and tug at the heartstrings . I mention the single parent with four kids running the show and I talk about the dad coaching a team that his kids aren’t even on... At this point the unwilling parent speaks up, " Alright. Yes, I’ll do it. " I’m secretly relieved because I know there’s real power in sharing volunteer responsibilities among many. The unwilling parent organizes the meal schedule, sends out emails, and collects money for end-of-season gifts. Somewhere along the way, the same parent ends up becoming an invaluable member of the team. The coach is able to focus on the kids while the other parents are relieved to be off the hook for another season. Handing out sliced oranges to bloodthirsty kids can be as exciting as watching your own kid score a goal. Still, most of us volunteers breathe a sigh of relief when the season comes to a close. That relief is coupled with a deep understanding of why the same people keep coming back for more: Connecting to the community ( 社区 ) as you freely give your time, money, skills, or services provides a real joy. Volunteering just feels so good. In that sense, I’m pretty sure volunteering is more of a selfish act than I’d freely like to admit. However, if others benefit in the process, and I get some reward too, does it really matter where my motivation lies?
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【单选题】下列化合物按沸点降低的顺序排列的是 : 1 )丁烷 2 )己烷 3 ) 3- 甲基戊烷 4 ) 2- 甲基丁烷 5 ) 2,3- 二甲基丁烷 6 )环己烷
A.
6 ) >5 ) >3 ) >4 ) >1 ) >2 )
B.
2) >5 ) >3 ) >4 ) >1 ) >6 )
C.
6 ) >2 ) >3 ) >5 ) >4 ) >1 )
D.
3 ) >5 ) >6 ) >1 ) >2 ) >4 )
【单选题】失速的直接原因是()
A.
低速飞行
B.
高速飞行
C.
仰角过大
【单选题】失速的直接原因是
A.
低速飞行
B.
高速飞行
C.
迎角过大
【单选题】下列化合物按照沸点降低顺序排列 1 )丁烷 2 )己烷 3 ) 3- 甲基戊烷 4 ) 2,3- 二甲基丁烷
A.
1>2>3>4
B.
2>3>4>1
C.
1>3>2>4
D.
2>3>1>4
【单选题】将下列化合物按沸点降低的顺序排列正确的是 ( ) 1丁烷 2己烷 3 3- 甲基戊烷 4 2- 甲基丁烷 5 2 , 3- 二甲基丁烷
A.
②>③>⑤>④>①
B.
③>②>⑤>④>①
C.
①>③>⑤>④>②
D.
②>③>④>⑤>①
【单选题】下列化合物与NaI-丙酮溶液反应的活性比较中,正确的是,( )A.2-甲基-2-氯丙烷> 2-氯丁烷>1-氯丁烷;B. 2-甲基-2-氯丙烷> 1-氯丁烷>2-氯丁烷; C. 1-氯丁烷> 2-氯丁烷>2-甲基-2-氯丙烷; D.1-氯丁烷>2-甲基-2-氯丙烷> 2-氯丁烷;
A.
2- 甲基 -2- 氯丙烷 > 2- 氯丁烷 >1- 氯丁烷
B.
2- 甲基 -2- 氯丙烷 > 1- 氯丁烷 >2- 氯丁烷
C.
1- 氯丁烷 > 2- 氯丁烷 >2- 甲基 -2- 氯丙烷
D.
1- 氯丁烷 >2- 甲基 -2- 氯丙烷 > 2- 氯丁烷
【单选题】C006、失速的直接原因是
A.
低速飞行
B.
高速飞行
C.
迎角过大
【简答题】将下列化合物按照沸点降低的顺序排列: ( 1 )丁烷 ( 2 )己烷 ( 3 ) 3- 甲基戊烷 ( 4 ) 2- 甲基丁烷 ( 5 ) 2 , 3- 二甲基丁烷 ( 6 )环己烷
【单选题】下列食用菌中能够提高人体内吞噬细胞吞噬病毒能力的是( )
A.
平菇
B.
香菇
C.
羊肚菌
D.
猴头菇
【单选题】最早出现的国际贸易术语惯例是
A.
华沙-牛津规则
B.
美国对外贸易定义修订本
C.
国际贸易术语解释通则
D.
跟单信用证统一惯例
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