阅读材料，回答问题。
材料一 外争主权，内除国贼，反对在对德“和约”上签字。
                                                                                                                                                             ——“五四”口号
材料二 “在‘五四’运动90周年之际，我们回顾历史，缅怀先烈，进一步弘扬伟大的‘五四’精神，这对于激励广大青年同全国各族人民一道实现中华民族伟大复兴而不懈奋斗，具有十分重要的意义。”
                                                                                                                                                              ——李长春讲话
请回答：
（1）从材料一可以看出：“五四”运动具有怎样的性质？“五四”运动的导火线是什么？“外争主权”在当时具体包括哪些内容？（列举一条）
（2）在“五四”运动的革命洪流中，***应运而生。为***诞生准备了思想条件的事件是什么？ ***的诞生有何历史意义？
（3）90年来“五四”运动的精神激励着一代又一代青年人为“实现中华民族伟大复兴而不懈奋斗”。谈谈你对“五四”精神的理解。

现有1000个氨基酸，其中氨基有1020个，羧基有1050个，则由此合成的4条多肽链中共有肽键、氨基、羧基的数是       （   ）

选择恰当的词句填空（    ）

小明爬到床底下，偷偷躲了起来，        从床下拽了出来，送到幼儿园去了。

短文改错

下面短文中有10处语言错误。请在有错误的地方增加、删除或修改某个单词。

增加：在缺词处加一个漏字符号（∧），并在其下面写上该加的词。

删除：把多余的词用斜线（﹨）划掉。

修改：在错的词下画一横线，并在该词下面写出修改后的词。

注意：1.每处错误及其修改均仅限一词；

2.只允许修改10处，多者（从第11处起）不计分。

My old classroom was interesting because three side of the classroom were made from glass. I enjoyed sit close to the windows and looking at the view. On the left-hand side of the class, I could easy see the football field. In the mornings, it was full of students exercising. The view from the back of the classroom is also splendid. Close to the school there was a beautiful park with many trees around them. Farther in the distance, I could not enjoy the view of snowy mountains. On the right side of the class was the road. I was always interested to see the drivers in hurry in the morning. The position of the classroom with its view made me felt like I was dreaming. If I was only a child when I studied in that classroom, I will never forget it.

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按拼音写汉字