问题: Which brake(s) should be used on a slippery surface?
答案: Both, but use the front first as gently as possible, and only very gently (if at all) with the rear brake
解说: Apply the front brake first, then the rear brake. Do so gently to avoid skidding. Keep the bike as upright as you can or you are at extreme risk of the front wheel washing out. Note that some motorcycle instructors advise you to only use the rear brake in this situation, which contradicts NZTA's information regarding this question.