如图，在△ABC中，AD是BC上的高，tanB=cos∠DAC．

计算：

根据短文，判断正（A）误（B）。
   One day a poor man was cutting a big piece of wood (木头) near a river. Suddenly his old axe (斧子) fell into the water. He felt very sad because he lost his only axe. Then all at once a beautiful fairy (仙女) came out and asked the man what was the matter.
   “I have lost my axe." he said, “It fell into the water when I was cutting the wood."The fairy showed him a gold axe and asked, “Is that yours?”"No."said the man.
   The fairy then showed him a silver axe and asked again, "Is this yours?""No." again answered the man.
   Then she showed him the old axe.“Yes, that is mine.” called out the happy man.“I know it well enough.” said the fairy, “I only wanted to see if you would tell me the truth, and now I'll give you the gold axe and the silver axe besides your own one.”

党风廉政建设和反腐败斗争是长期的、复杂的、艰巨的任务。***说，反腐倡廉必须常抓不懈，拒腐防变必须警钟长鸣，关键就在“常”、“长”二字，—个是要经常抓，一个是要长期抓。反腐倡廉必须常抓不懈的哲学依据是
①人类追求真理的过程并不是一帆风顺的 
②事物发展方向是前进的、上升的，道路是曲折的 
③事物的性质主要是由主要矛盾的主要方面决定的 
④事物的发展从量变开始，量变是质变的必要准备

诚信是公民的基本道德规范。郓城县某中学8．5班要举行“诚信之星”评选活动，下列同学中你不会投票的是（    ）

①小强考试抄小抄，没有被老师发现

②小华负气离开家，把躲藏的地点告知好朋友小云。并要求保密，小云及时转告小华的父母

③学生会干部小刘在检查卫生时，为了让自己班级不被扣分，悄悄地把地上的纸屑踩在脚下

④数学科代表小秦没有做数学作业，可是在不交作业的名单上却没有自己的名字

⑤小明为了父母高兴，涂改了考试成绩

⑥虽然天下雨了，但小燕还是按约定去帮助同学辅导功课

⑦小金承诺不将同学上网的事情告诉老师

⑧大家约好周日排节目，梅梅却为了过生日没有参加排练