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阅读理解。 We always convince ourselves that life will be better after we get married, have a baby, than another. Then we are frustrated that the kids aren't old enough and we'll be more content when they are. After that we're frustrated that we have teenagers to deal with. we will certainly be happy when they are out of that stage. We always tell ourselves that our life will be complete when our spouse (配偶) gets his or her act together, when we get a nice car, and are able to go on a nice vocation and when we retire. The truth is, there's no better time than right now. If not now, when? our life will always be filled with challenges. It's best to admit this to ourselves and decide to be happy anyway. One of my favorite quotes comes from Alfred Souza. He said.' for a long time it had seemed to me that life was about to begin-real life. But there was always some obstacle in the way, something to be gotten through first, some unfinished business, time still to be served, a debt to be paid. Then life would begin. At last it dawned on me that these obstacles were my life.' This perspective has helped me to see that there is no way to happiness. Happiness is the way. So treasure every moment that you have. And remember that time waits for no one. So stop waiting until you finish school, until you go back to school; until you get married, until you get divorced; until you have kids; until you retire; until you get a new car or home; until spring; until you are born again to decide that there is no better time than right now to be happy... Happiness is a journey, not a destination. So, work like you don't need money, love like you've never been hurt, And dance like no one's watching. 1. Which is the best title for the passage? A. Life Will be Better B. Be Brave to Face the Challenges in Our Life C. Happiness is A Journey D. Don't Wait 2. Why do we always convince ourselves that life will be better after we get married, have a baby, than another? A. Because happy life is always in the future. B. Because we don't realize treasuring every moment means happiness. C. Because no one will be happy until he gets married. D. Because only if we get to a destination, we can lead a happy life. 3. By reading Alfred Souza's words, we know _______. A. his life was always filled with too many obstacles for him to face B. he had to face more obstacles than anyone else C. the obstacles in life helped him to see what happiness is D. he realized that there is no way to happiness 4. What does the writer want to tell us? A. Time and tide waits for no man, so treasure every moment. B. Will is power,so do what you want to do. C. A thousand words will not leave so deep an impression as one deed, so do not talk, just do it. D. So said, so done, so do what you said.
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【简答题】English always _________ (confuse) me. My head aches when I read English.
【单选题】形成()的切削过程较平稳,切削力波动较小,已加工表面粗糙度值较小。
A.
节状切屑
B.
带状切屑
C.
粒状切屑
D.
崩碎切屑
【单选题】形成( )的切削过程较平稳,切削力波动较小,已加工表面粗糙度值较小。
A.
带状切屑
B.
节状切屑
C.
粒状切屑
D.
崩碎切屑
【多选题】以下说法错误的有( )。
A.
形成带状切屑时,切削过程平稳,切削力波动小,已加工表面质量好。
B.
挤裂切屑形成的条件是加工硬度较大的材料,采用较高的切削速度和加大的刀具前角。
C.
单元切屑是在加工脆性金属材料时容易得到。
D.
以上说法都不对。
【多选题】下列关于切屑的形成,说法正确的是
A.
材料塑性不同,产生的切屑类型不同
B.
形成带状切屑的切削过程较平稳,切削力波动较小,已加工表面粗糙度值较小
C.
形成节状切屑的切削过程变形较大,切削力也较大,且有波动,工件表面较粗糙
D.
形成崩碎切屑的过程中,切削热和切削力都集中在切削刃和刀尖附近,刀尖易磨损,并产生振动,影响工件表面质量
【单选题】形成( )的切削过程较平稳;切削力波动较小,已加工表面粗糙变值较小。
A.
带状切屑
B.
节状切屑
C.
粒状切屑
D.
崩碎切屑
【判断题】河积岩垂直节理发育,名山常有群峰族拥、峭拔危立、雄伟险峻的特点。
A.
正确
B.
错误
【判断题】在其他条件不变的条件下,固定成本总额越小,保本点越低。( )
A.
正确
B.
错误
【单选题】形成( )的切削过程较平稳,切削力波动较小,已加工表面粗糙度值较小。
A.
崩碎切屑
B.
节状切屑
C.
粒状切屑
D.
带状切屑
【判断题】在其他条件不变的条件下 , 固定成本总额越小, 保本点越低
A.
正确
B.
错误
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