什么叫油品比重？

The other day I heard a few local musicians talking:

“I hate all the terrible pianos in this town. I hate that rubbish they play on the radio. They can’t even understand a bit of music.”

“I’m never playing in that club again. Too many drunks and nobody listens to us.”

But, one younger musician said, “There are a few clubs that book my band a few nights a month, and I’m trying to find other places to play. I’m also looking to book a few summer festivals this year.”

I’ve heard that you are the average of the five people whom you spend the most time with, or to put it another way, you are who your friends are.

Attitudes are important. Whether they’re positive or negative, they’re rubbing off on you. If you’re around people who complain about lack of work and about other musicians, or blame (责怪) others, and you play the role of victim (受害者), chances are you will start to as well. So it’s time to take a look at the people you call “friends”.

This is an easy exercise: Make a list of the people who you hang out with, and simply stop spending time with the negative people on your list. Set a new standard (标准) for yourself and don’t become friends with people who fall below that standard.

Keep successful people around you and your own chances for success will be much better. Ask them how they do it. Ask if they will help you get the work you’re looking for, or maybe give you some advice to help you on your career path.

小题1:Which of the following would be the best title for this passage?

A．A friend in need is a friend indeed

B．How to make friendship last for ever

C．You are who your friends are

D．Friends are the most important in one’s success小题2:The underlined sentence “they’re rubbing off on you” in Paragraph 6 means ______.

A．they’ll push you ahead

B．they’ll influence you

C．they’ll cover your shortcomings

D．they’ll help you achieve your goal小题3:The musicians’ words at the beginning are written mainly to show ______.

A．the musicians’ living conditions are quite poor

B．people have poor taste in music

C．people have different attitudes towards the same thing

D．young people have greater chances of succeeding小题4:By taking the exercise mentioned in Paragraph 7, you can ______.

A．improve a lot in making more friends

B．come to the right way of making friends

C．develop a better relationship with your friends

D．arrange the time with your friends properly

采煤机润滑的主要作用是（）。

A、冷却作用

B、减少磨损，减轻磨损

C、冲洗作用

D、密封作用

井下一氧化碳的主要来源有：瓦斯、煤尘爆炸；煤炭的氧化和火灾；（）。

A.地面大气

B.施工钻孔

C.采掘工作面的爆破作业

D.采掘活动

How many of us would temp for three years while we waited for the perfect job Not many of us, perhaps. But Wentworth Miller, the "Prison Break" star, said he chose to wait even longer time (1) he found the right job.
"Actually I think it might have been three or four years until I was lucky enough to get guest (2) on TV shows," said Miller, 34, who rose to international stardom (3) to "Prison Break" in 2006. That kind of patience and p will was portrayed in "Prison Break". Miller (4) engineering wizard Michael Scofield, who tries everything to break out of a Chicago (5) with his brother. Miller said he was fond of his character, (6) he said "exists in shades of grey".
Miller comes from a (7) of teachers. He said he didn’t seem fated for a career in the arts, (8) his passion for acting. After (9) from Princeton with an English degree, he moved (10) his parents’ request to Los Angeles to look for a stable life. He started (11) in a little company that made television movies. This (12) simply faxing, filing, walking the boss’ dog and going to the store for the boss’ lunch. Every weekend during the summer, Miller (13) go to the office (14) he didn’t have air-conditioning. "I would hang (15) in the conference room and set up camp and rob the company kitchen," recalled Miller.
(16) , Miller realized he still had questions about his choice. He decided to quit. But the boss said he was making a mistake and offered him a well-paid assistant position. "I eventually (17) that if I did the corporate job, it would be great if I was successful, but I would always wonder about the (18) . If I did the acting and was successful, I would never wonder (19) that job," he explained. He quit and temped (20) many people in the entertainment industry.
Now, he’s a hot star and has people coming up to him at film festivals saying, "Weren’t you the one who (21) to stand by the copy machine "
"That was tough, but I’m glad I have that perspective. Because now I’m at a point (22) big shots laugh at all my jokes and I think, You know, I got coffee for people like you for six years’. So I know what’s (23) , because I’ve seen the other side." But what if, when he was offered the corporate job, there had been more money "It was never about the (24) There’s a kind of excitement that comes along with acting. I can’t find it anywhere else. Even if I had to go back to temping, even if this is not the beginning of an amazing career, I would not (25) making that jum
p."

当采用标准UML构建系统类模型(Class Model)时，若类B除了具有类A的全部特性外，类B还可定义新的特性以及置换类A的部分特性，那么类B与类A具有 (39) 关系；若类A的对象维持类B对象的引用或指针，并可与类C的对象共享相同的类B的对象，那么类A与类B具有 (40) 关系。

A．聚合
B．泛化
C．传递
D．迭代