下列动物中，幼体用鳃呼吸，成体用肺呼吸、皮肤辅助呼吸的是（ ）

阅读理解

                                                                                      (B)

    Long long ago, there was no paper in the world. People had to write characters(汉字) in bamboo slips or stones.Then there was a man named Cai Lun who was a Chinese man. He made people use all kinds of things to invent paper. From then on, people can use paper to write on. Paper is a great invention. We always remember the great inventor Cai Lun. Nowadays paper is very useful in our work, study and our life. It really means a lot to human beings.

根据短文内容，判断下列句子的正 (A)与误 (B)，并在答题卡的相应位置将其涂黑。

阅读课文《永远的歌声》选段，回答问题

村头村尾到处响着我们的歌声。为此，我还和姐姐争论过，到底是我们老师有知识，还是村长、区长有知识；到底是区剧团来的人唱得好听，还是我们老师唱得好听。

我说，我们老师好，样样好，天下第一好。

不知为什么，老师嗓子突然嘶哑了，不但唱不出好听的歌儿来了，还咳嗽，一声接一声。

放学的路上，二牛拽住我，悄悄地问：“是男子汉吗？是，明天就跟我进东山去！我知道东山石沟里有样草药叫烟袋锅花，专治咳嗽，老师一吃准好。”我马上想起大人告诫的东山不能去，山里有狼，可还是立即使劲地点了点头。

文中马上说明了什么？立即又说明了什么？