马端临的《文献通考·选举考》载：“进士者时共贵之，主司褒贬，实在诗赋，故士林鲜国体之论，其弊一也……所习非所用，所用非所习，故当官少称职之吏，其弊三也。”此记载指出了(   )

一个圆形人工湖如图所示，弦AB是湖上的一座桥，已知桥AB 长100m，测得圆周角∠ACB=45°，则这个人工湖的直径AD为（  ）

根据情境及首字母提示填入适当的单词，使短文句意完整、通顺。
Pen pal wanted
   His name is Wang Lei. He is a____ C_____ boy. He wants a pen pal in____ F_______ . He thinks it’s a very____ i______  country and he wants to learn some French. He____ l_____  in Beijing, China with his parents now. He is 14 ____  y______  old and his____ b______  is in November. He can speak Chinese and a little English. What are his ____  l______ ? He likes watching sports games on TV and ____  p_____ computer games with his friends. His favorite subject is computer science. It’s____  f______ . He doesn’t like math, because it’s too difficult.
   Please write to____ h____ and be his pen pal.