1. [单选题]Upon the completion of required tests, a ____ should be placed on each extinguisher, showing the date and the person who completed the tests.
  A. cap 
  B. disc 
  C. tag 
  D. cover 
 
2. [单选题]为避免碰撞所采取的转向角,一般应:
  A. 不小于10° 
  B. 不小于20° 
  C. 不小于30°,并应能导致在安全距离驶过并使他船用视觉或雷达观察时容易察觉到 
  D. 与当时的会遇局面有关,只要能使他船用视觉或雷达观察时能察觉到即可