单词拼写。

1. We shouldn't have a wrong ____(态度)towards the students who are poor at their studies.

2.He is _____  (有决心的)to catch up with the others.

3. He was too____  (顽固的)to admit that he was wrong.

4. The new bridge has been finished two years ahead of_____(日程).

5.We are looking for someone who is___  (可靠的)and hard-working.

《公羊传》大一统理论主要包括以“尊王”为核心的政治一统，以“内华夏”为宗旨的民族一统，以“崇礼”为中心的文化一统。这表明大一统源于

A．夏商时期的方国联盟

B．西周封建诸侯与分封制度

C．秦中央集权国家建立

D．董仲舒对儒家学说的改造