矩形硬母线的弯曲宜进行冷弯，如需热弯时，铜加热温度不应超（）ºC。A、250 B、35

一个鱼池宽8米，长20米，一只青蛙每天绕鱼池跳m圈，那么青蛙每天绕鱼池多少米？

读“海南年降水量分布（单位：毫米）图”，回答下题。

海南省西部昌化拥有我国少有的热带滨海沙漠景观，其成因最可能是

A．地处内陆，受大陆气团控制

B．终年受副高控制，盛行下沉气流

C．地处夏季风背风地带，降水少、蒸发强

D．海水侵蚀形成

US president Barack Obama told students that it takes hard work in school to prepare for a rewarding career in his “back to school” speech,   36  last Tuesday in Virginia, US. Here is excerpt （节选）from his speech:

I know that sometimes, you get the  37    that you can be rich and successful without any hard work –  38   your ticket to success is through rapping or basketball or being a reality TV star, when chances are, you’re not going to be any of those things. But the truth is, being successful is   39   .You won’t love every subject you study. Not every homework assignment will seem completely important to your life right this minute. And you may not succeed at    40     the first time you try.

That’s OK. Some of the most successful people in the world are the ones who’ve had the most   41  .JK Rowling’s first Harry Potter book was   42  12 times before it was finally published. Michael Jordan was    43    his high school basketball team, and he lost hundreds of games and missed thousands of shots during his career. But he once said. “I have failed over and over and over again in my life. And that is why I succeed.”

These people succeeded because they understand that you can’t let your failures  44   you. No one’s    45  being good at things; you become good at things through hard work.

Don’t be afraid to ask questions. Don’t be afraid to ask for help when you need it. I do that every day. Asking for help isn’t a sign of weakness; it’s a sign of    46    . It shows you have the courage to admit when you don’t know something, and to learn something new.

And even when you’re  47     , even when you’re discouraged, and when you feel like other people have given up on yourself, you won’t give up on yourself. Because when you give up on yourself, you give up on your country.

36. A. addressed                  B. claimed                   C. delivered                  D. announced

37.A. feelings               B. definition           C. concept                      D. sense

38. A. that                           B. which                       C. what                          D. whatever

39. A. inaccessible                    B. hard                        C. rough                          D. unavailable

40.A, anything                          B. everything                 C. nothing                        D. something

41. A. effort                B. attempts                   C. failures                        D. successes

42. A. denied             B. turned away        C. declined           D. rejected

43. A. cut from                        B. cut off                       C. cut down           D. cut in

44. A. confirm                          B. define                      C. identify                        D. prove

45. A. brought up             B. raised                        C. fed                           D. born

46. A. strength             B. courage                       C. weakness                      D. perseverance

47. A. struggling                 B. fighting             C. trying                          D. succeeding

国家（）技术力量雄厚、设备和运输条件好的生产、销售、使用或者处置放射性物品的单位按照《放射性物品道路运输管理规定》第八条规定的条件，申请从事非经营性放射性物品道路运输。

A.鼓励

B.不允许

C.允许

E.中国古代社会经济的主体是（）。

A.商品经济

B.城市经济

C.海洋贸易

D.农耕自然经济