题目

 I'm new here, so I have        friends. A. few          B. a few       C. little          D. a little 答案：A8．如图，AB是⊙O的直径，弦DB、AC的延长线相交于点P，PE垂直于AB的延长线于点E．（Ⅰ）求证：∠PCE=∠PBE；（Ⅱ）若∠PAE=30°，EB=1，PB=2BD，求PE的长．