题目内容

男性患者,72岁,查体见角膜边缘及周围出现灰白色浑浊环,是由于下列何种原因所致

A. 类脂质沉着
B. 铜代谢障碍
C. 铁代谢障碍
D. 维生素C缺乏
E. 白内障

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关于心音的叙述,正确的是

A. 第一心音标志着心室舒张开始
B. 第二心音标志着心室收缩开始
C. 第三心音出现在心室舒张早期
D. 第四心音出现在心室收缩早期
E. 心音有4个,通常能听到S1、S2和S4

The reason he has been such a success ______ he never gives up.

A. is what
B. is that
C. is because
D. is

"I like your furniture very much.""Thank you. We bought ______ in Denmark."

A. the most of them
B. most of them
C. the more of it
D. most of it

Students today are writing ______ of poetry.

A. a great many lines
B. quantities of lives
C. lots lines
D. a large number

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