月球属于下列天体系统中的（）
①宇宙
②地月系
③银河系
④太阳系
⑤河外星系
⑥总星系
A.①③⑤⑥
B.②④⑤
C.①②③④⑥
D.①②③④⑤⑥
参考答案：C
解析：
解析本题考查天体系统的层次。距离相近的天体因相互吸引和相互绕转，构成不同级别的天体系统，天体系统的层次为：最高一级为总星系（即目前所知的宇宙范围），第二级为银河系和河外星系（河外星系简称星系），银河系又向下分成第三级的太阳系及其他恒星系，太阳系向下分成最低一级的地月系和其他行星系。所以本题选择C选项。
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| While being laid off and entering into retirement are far from the same, they both often leave one half of a couple with extra time on their hands, and plenty of pent-up(被压制的) energy that their significant other, coming home after a long day at work, can't handle. WSJ.com recently wrote an article that shared a few words of wisdom on how to deal with this situation. Here are a few of their tips: 1. Be nice to each other and have a positive attitude. As hard as it may be, try to not be discouraged during the job search and make sure to support your spouse(配偶). If one of you says something negative, the other should try to come back with a positive. And don't forget, compliments can go a long way. 2. Encourage your partner to take up a hobby, get a side job or join a club. Typically, people work an average of forty hours a week, eight to nine hours a day. So is it any wonder that someone suddenly unemployed might go crazy with all that free time? In order to squash the boredom before it begins, encourage your partner to stay as busy as possible. Stay healthy and join a sports team, or learn how to cook (this benefits your spouse as well). Another option is taking up a side job serving food or working as a sales associate. This will allow your sweetie to interact with other people as well as earn some money. But, of course, new hobbies shouldn't take up the time needed to continue the job hunt. 3. Encourage them to continue their existing friendships and to foster(培养) new ones. As WSJ.com points out, those who recently lost their jobs are sometimes embarrassed and therefore shut out family and friends. They might cling(依靠)to their partners for support. Tell your wife or husband to talk to their families and friends. They know and love them, and can be a good support system (rather than a support group of one: you). 4. Give each other a little space before and after "couple time." You may be happy to spend time with your significant other but need a little alone time after working all day. To the recently laid off: let your partner settle down, drink a beer, and watch a little television before you bombard (发出连珠炮似的问题)him with your idea to go skydiving or white water rafting. You may have an endless amount of pent up energy, but they probably need some space to relax. 5. Trust each other. When everything is going great, it's easy to be happy and to trust your partner is doing everything he should. It's not nearly as simple when half of your income is gone. Stand by each other as a couple and trust that each of you is doing everything necessary to get another job. | ||||||||||||||
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