冬季使用蓄电池时，特别是冷启动发动机时，应进行预热，且每次启动时间不应超过（）。 A

女性，25岁，既往曾因活动时心悸、气短，诊断为风心病，二尖瓣狭窄。近5日出现夜间阵发性呼吸困难。住院后服用利尿剂和扩血管药物后，未再发作，体检发现颈静脉怒张、肝大和双下肢水肿，其呼吸困难改善的最可能原因是

A．经合理治疗，左心功能被纠正

B．在左心功能不全的基础上并发了心包积液

C．左心功能不全加重

D．左心功能不全的基础上发生了右心功能不全

E．右心功能不全代替了左心功能不全

第二节（共5小题;每小题2分,满分10分）

根据短文内容,从短文后的选项中选出能填入空白的最佳选项。选项中有两项为多余选项。 (E="AB " F=" AC  " G=AD)

All over the world people enjoy sports. Sports help to keep people healthy and happy, and to live longer.

61. They buy tickets or turn on their TVs to watch the games. Often they get very excited when their player or team wins.

62. Football, for example, has spread around the world. Swimming is popular in all countries near the sea or in those with many rivers. What fun it is to jump into a pool or lake, whether in China, Egypt or Italy!  __63___. Think how many lovers to skate or ski in Japan, Norway or Canada.

Some sports or games go back thousands of years, like running or jumping. Chinese wushu, for example, has a very long history. But basketball and volleyball are rather new. Neither one is a hundred years old yet. ___64_____. Water—skiing is one of the newest in the family of sports.

People from different countries may not be able to understand each other, but after a game together they often become good friends. ____65_____. One learns to fight hard but fight fair, to win without pride and to lose with grace. （胜不骄,败不馁）

A. And think of people in cold countries.

B. Sports help to train a person’s character （性格）

C. Not a few people like sports in the word.

D. Many people like to watch others play games.

E. People aren’t inventing new sports or games.

F. Some sports are so interesting that people everywhere take part in them.

G. People are inventing new sports or games all the time.

普鲁卡因用作阻滞麻醉时的常用浓度（）

A.0.25%～0.5%

B.0.5%～1%

C.1%～2%

D.2%

E.2%～4%

招标人对已发出的招标文件进行必要的澄清或者修改的，应当在招标文件要求提交投标文件截止时间至少( )天前，以书面形式通知所有招标文件收受人。

A．28
B．14
C．15
D．20

油条的成本毛利率为72%，在其成本不变的情况下，其销售毛利率是( )。

A．41.86%

B．257%

C．124%

D．20%