正确答案: BC

后纵韧带 黄韧带

题目：参与椎管壁构成的有（ ）

解析：BC

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举一反三的答案和解析：

[单选题]特瑞普利特(H·Triplett)最早研究的现象是( )

社会懈怠

[单选题]辩证唯物主义认识论的首要的和基本的观点是（ ）

实践的观点

[单选题]我国诗歌史上被称为“诗圣”的是 （ ）

杜甫

[单选题]As knowledge increased, colleges began to teach______.

many new subjects

解析：

39．答案为C  从第四段可知随着知识的丰富，大学的学科逐渐增多。

[单选题]Passage FiveHollywood (好莱坞) is a suburb of the city of Los Angeles (洛杉矶) in California. Until 1908 it was no more than a quiet village on the northern side of the city, but in that year William Selig, one of the first people to make films, set up a film-producing workshop (车间) in Los Angeles. By 1911 , David and William Horsely had set up another one in Hollywood, and at about the same time oil was discovered in the neighborhood. Thus Hollywood quickly became a big district given over to the film industry and to oil wells

followed William Selig to Hollywood and settled down there

解析：

     52．答案为C  此考题为细节题。文章第l段第2句告诉我们：William Selig于1908年建了一个电影制造车间，而从第3句By 1911，David and William Horsely had set up another one in Hollywood...中，我们就可以认定C正确。

[单选题]黑龙江省是种植水稻纬度最北的地方，此现象是__________对生物分布的限制作用的表现。（ ）。

有效积温

[单选题]请在第34处填上正确答案。

happy

解析：作者最后跟孩子们说明，自己最近不太高兴。不是不太kind“善良的”或easy “容易的”，所以不选A和C；B项reasonable“讲道理的”，也不符合此处语境。故选D。