The rate of a reaction depends on __________. A: collision frequency B: collision energy C: collision orientation D: all of the above E: none of the above

1) Have you ever heard ground collision?2) what are the possible reasons for ground collision?3) What can be done to avoid ground collision?

Effective collision is a powerful collision between active molecules that can produce chemical reactions.

Risk of collision may exist ______.

When you doubt the existence of risk of collision, ________.

After the collision, he examined the considerable ______ to his car.

In with situation do you think a risk of collision exists.

The Rules require that a stand-on vessel SHALL take action to avoid collision when she determines that___ A: isk of collision exists B: the other vessel will cross ahead of he C: the other vessel is not taking appropriate action D: collision cannot be avoided by the give-way vessel' s maneuver alone

There has been a collision ________ a number of cars on the main road to town.

In which situation do you think a risk of collision exists?