腹股沟管解剖结构说法错误的是 A．腹股沟管的内口即深环，外口即浅环 B．上壁为腹内斜

一火车以20m/s的速度行驶，突然迎面开来一辆长300m的货车以10m/s的速度向后驶去，某同学坐在火车窗口看到货车从他眼前经过的时间是（　　） A．5s B．10s C．15s D．30s

Questions 14-18

·Using the information in the text, complete each sentence 14-18, with a word or phrase from the list below.
·For each sentence (14-18), mark one letter (A-G) on the Answer Sheet.
·Do not mark any letter twice.
14. According to Dr. Score, lightning is caused by hail falling through ______.
15. The refrigerated rod served the same functions as ______.
16. Ice particles bouncing off hail falling through a cloud acquire ______.
17. In the paragraph four the word "duplicated" means ______.
18. According to S.E. Regnolds, there could be no lightning without ______.

• A. copy
• B. a positive charge
• C. a negative charge
• D. super cooled clouds
• E. falling hail clouds
• F. hail and super cooled clouds
• G. moisture particles

采用面向对象开发技术的主要原因是( )。

A．降低开发成本
B．软件重用和便于维护
C．减少开发时间
D．提高软件的可靠性

中国工程咨询协会的最高权力机构是______。

A．会员代表大会
B．常务理事会
C．理事会
D．秘书处

水准仪的读数点应该是中丝处数值。( )