阅读理解

     风烟俱净，天山共色。从流飘荡，任意东西。自富阳至桐庐，一百许里，奇山异水，天下独绝。

     水皆缥碧，千丈见底。游鱼细石，直视无碍。急湍甚箭，猛浪若奔。夹岸高山，皆生寒树。负势竞上，互相轩邈；争高直指，千百成峰。泉水激石，泠泠作响；好鸟相鸣，嘤嘤成韵。蝉则千转不穷，猿则百叫无绝。鸢飞戾天者，望峰息心；经纶世务者，窥谷忘反。横柯上蔽，在昼犹昏；疏条交映，有时见日。

20世纪末，人类进入了高度的信息化时代，上网人数每年正以翻一番的速度增长。上网群体主要是（   ）

选词填空，阅读下列短文，用方框内所给单词的正确形式填空

    As a student, what does it mean " to be good"? TheCode of Conduct for Primary and Middle School Students (《中小学生守则》) holds the answer.

    Last year, a new draft (草案) code came____, replacing the old content. There are some important ____. Big phrases like"have deep love for your motherland, the people and the Communist Party of China" are not there anymore. The new code tells students to respect the national flag and national emblem (国徽)____. It also ____students to "know about China's history".

    Also, the new code asks students to "lead alow-carbon (低碳的)____"，"takepart in voluntary work"， and "control the time you spend online". The change on brave actions ____draws attention. The old code told students to act bravely when they saw people ____rules. But the new code asks students to learn to protect ____and ask for help.

    Many teachers are ____to see these changes. Students say they know____to do when they face some problems.

糕点疏松的主要成分中含有碳酸氢钠，某化学兴趣小组对碳酸氢钠的化学性质进行探究．