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问题 单项选择题 A1/A2型题

室间隔缺损的超声表现，下列错误的是（）

A.二维超声可见室间隔回声中断

B.二维超声可见缺损断端的T形征

C.连续波多普勒显示收缩期高速分流频谱

D.彩色多普勒血流显示收缩期左向右分流

E.M型超声可见左心室缩小

答案

参考答案：E

解析：室间隔缺损的间接征象为左心室容量负荷过度的表现，小的缺损由于分流量少，左、右心室无明显扩大，中等以上缺损左向右分流量多，出现左心室、左心房扩大。

听力题

根据句意及首字母或汉语提示，写出各句中所缺单词的正确形式。（每空一词，共10分）

小题1:As you go up a mountain, you have to overcome the earth’s g           which pulls you down.

小题2:The m             leaf has become the most important symbol of Canada since the national flag was introduced in 1965.

小题3:The little girl was t          at the thought of being left alone at home and cried.

小题4:He went to the United States in the 1980s and s                down there.

小题5:Don’t leave matches or cigarettes on the table w              reach of little children.

小题6:How quickly a fuel burns depends on how well it is mixed with              (氧气) or air.

小题7:The policemen were sent to find the black box because it showed why the plane had           

(坠毁).

小题8:The idea                 (存在) only in the minds of us young people today.

小题9:This problem is only                 (稍微) difficult so I can work out.

小题10:They claimed that when they were               (包围) by the gang they acted in self-defense.
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选择题

某电子股份有限公司，国有经济股份占40%，集体经济股份占25%，其他各种经济成分股份占35%。那么该公司

①是国有控股的企业   ②是混合所有制企业

③是公有制企业       ④具有明显的公有性

A．①②③

B．②③④

C．①②④

D．①②③④
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