题目

同学们在做“铁丝在氧气中燃烧”实验时，下列做法错误的是．（ ） A . 将光亮的铁丝由瓶口慢慢插入盛有氧气的集气瓶中 B . 将铁丝绕城螺旋状以便于聚热，并能增大铁丝的受热面积以及与氧气的接触面积 C . 待铁丝下端的火柴即将燃尽时将铁丝插入集气瓶中 D . 将铁丝在空气中烧的红热后，插入盛有氧气的集气瓶中使其燃烧II．语言知识及应用（共两节，满分35分）第一节 完形填空（共10小题；每小题2分，满分20分）阅读下面短文，掌握其大意，然后从2l~30各题所给的A、B、C和D项中，选出最佳选项，并在答题卡上将该项涂黑。One evening I made a trip to the grocery store (杂货店). As I   21   the room I noticed a man off to the side with a small cardboard   22   that read something to the effect : “Needing change for a hot meal.”I also   23   several people passing him by with little more than a glance. He looked to be a traveler and seemed to be very humbled at having to ask of others. I too walked on by, but with a seed of a (n)   24   planted in my mind. I went to the far back of the grocery store where they offered the only thing I could think of that would be   25  . I bought him a couple slices of pizza and immediately went back outside to   26   it to him. I told him that it wasn’t much but it was the   27   think they had that was hot. I smiled   28   and turned to walk away and as I did he smiled back with a deep   29   and let out a very soft “thank you”. That look was worth ten times more to me than what I had been able to offer him, and it was a look I won’t   30  .21．A．knocked at       B．closed       C．left       D．entered22．A．sign         B．signal       C．notice       D．advertisement23．A．inquired      B．noticed     C．begged     D．stared24．A．dream         B．game     C．idea      D．trick25．A．cheap          B．hot       C．delicious   D．warm26．A．show         B．award       C．deliver      D．offer27．A．only         B．very     C．same     D．exact28．A．secretly       B．Shyly     C．gently       D．broadly29．A．shyness        B．curiosity   C．surprise    D．appreciation30．A．forget          B．forgive     C．treasure    D．Doubt