根据课文内容填空。《塞下曲》的作者是（）代诗人

A.对《桃花源记》文体的分析,能够帮助学生更深入地了解课文内容、作者思想

B.教师适时将学生的课堂讨论转移到网络平台的讨论,既保证了学生的学习探索积极性,又利于学生对课文的深入了解

C.网络平台快捷、高效,案例中的情况充分体现了在现代教学中网络平台已经逐渐在发挥着教学主导作用

D.教师把课堂争论引到网络平台交流,体现了预设比生成更重要的原则

A.《清明》

B.《塞下曲》

C.《夏日绝句》

B．根据课文内容在每个空白处填入一个恰当的词。

Two men walked slowly, one after another, through the shallow water of a stream. 61 they could see were stones and earth. The 62 ran cold over their feet. They had blanket packs 63 their backs. Suddenly, the man who followed 64 over a stone. He hurt his foot badly and called: “Hey, Bill, I’ve hurt my foot.” Bill 65 straight on without looking back. The man was 66 in the empty land, but he was not lost. He knew the way to their camp, where he would find food and bullets. He struggled to his 67 and limped on. Bill would be waiting for him there, and 68 they would go south to the Hudson Bay Company. He had not eaten for days. Often he 69 to pick some small berries and put them into his 70. The berries were tasteless, and did not satisfy, but he knew he must eat them.

A.1分钟、2小时

B.1小时、20分钟

C.1分钟、20分钟

根据图Q2.1填空：a为______，b为______，c为______，d为______，e为______，f为______，g为______。

图Q2.1 DNA转录结构示意图

A.荷叶是小水珠的摇篮

B.荷叶是小青蛙的停机坪

C.荷叶是小鱼儿的凉伞

D.荷叶是小蜻蜓的歌台