正确答案: ABE

管壁较薄 管径较细 集合淋巴结较多

题目：回肠的特点有 （ ）

解析：ABE

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举一反三的答案和解析：

[单选题]Passage FiveMany superstitious people are afraid of black cats. They believe that black cats have a strange power. If a black cat crosses their path, they think they will have bad luck.

woman's body and a cat's head

[单选题]既能屈髋关节又能屈膝关节的肌是 （ ）

缝匠肌

[单选题]根据以下选项，回答 85～86 题：

无收缩反应

[单选题]两种对立的发展观是（ ）

辩证法和形而上学

[单选题]As used in this passage, "structures" means ______.

organization

[单选题]Passage FourMillions of stars are traveling about in space. A few form. groups which journey together, but most of them travel alone. And they travel through a universe so large that one star seldom comes near to another.

moving about without a fixed course

解析：

46．答案为D  根据第一段可知恒星的运动是没有规律的。

[单选题]正常男性的红细胞计数为 （ ）

(4.0～5.0)×1012/L

[单选题]Passage ThreeEducation is not an end, but a means to an end. In other words, we do not educate children only for the purpose of educating them; our purpose is to prepare them for life. As soon as we realize this fact, we will understand that it is very important to choose a system of education which will really prepare children for life. It is not enough just to choose the first system of education one finds, or to continue with one's old system of education without examining it to see whether it is in fact suitable or not.

a means

解析：44．答案为B  此题为细节题。本文主要探讨教育问题。第一句就是主题句，给出了教育的定义。所以答案在第一段的第一句：Education is not an end，but a means to an end。

[单选题]饶基耶尔频度定律表明（ ）

属于低级频度的种类通常较多