下列关于振子叙述中错误的是()。 A.振子数与通道数对应 B.所有通道均在同一时间起

题型:单项选择题

问题:

下列关于振子叙述中错误的是()。

A.振子数与通道数对应

B.所有通道均在同一时间起作用

C.振子通道越多图像质量越好

D.阵元越多声束聚焦效果越好

E.控制各阵元的激励电压实施延时聚焦

考点:超声医学与技术(医学高级)超声诊断仪超声诊断仪题库
题型:单项选择题

某高层宾馆室内消火栓系统在室外便于消防车使用的地点设有水泵接合器,距室外消火栓或消防水池的距离宜为()米。

A.10-20

B.10-40

C.15-40

D.20-40

题型:单项选择题

Directions: Complete the following passage by filling in each blank with one word that best fits the context.

An old man lived with his son, his daughter-in-law and his four-year-old grandson. The family would eat together nightly. But the elderly grandfather always made  小题1: terrible mess on the table because of his shaky hands.  小题2:  the couple set a small table at the corner. There, the grandfather ate alone, 小题3: the rest of the family enjoyed their dinner at the dinner table.

Because the old man had broken a lot of dishes, his food was served in wooden bowls. The four-year-old boy watched it all  小题4: silence.

One evening, the father noticed his son playing with wood scraps.  小题5:  asked the child, “What are you making?” The boy replied, “Oh, I’m making bowls for you and Mama to eat your food from  小题6:   I grow up.”

The couple finally realized  小题7: they should do. That evening, he led the old man back  小题8:  the family table. For the remaining days, the old man ate every meal with the family.

题型:单项选择题

根据提示和要求完成下面一段话。   

       我们来到夏日的河边,只见这里一片生机勃勃的景象。垂柳就像美丽的姑娘,在微风中向我们点头微笑。枝头的小鸟欢快地唱着歌,好像在欢迎我们。(此时,河边的小草、野花、竹林,河里的荷花是什么样儿?蝴蝶、蜜蜂、蜻蜓又在于什么?请先读读画线部分的句子,然后选择一种植物和一种动物进行描写,要求用上打比方及把事物当做人来写的方法。)                                                                     

                                                                                                                                                             

漫步在夏日的河边,我                                                                                                                        。

题型:单项选择题

“天空鸟飞绝,群山兽迹灭,红军英雄汉,飞步碎冰雪!”这首诗反映的是 [ ]

A.北伐战争

B.南昌起义

C.秋收起义

D.红军长征

题型:单项选择题

领导影响力的权利性影响力是指

A.品格因素
B.资历因素
C.才能因素
D.感情因素
E.知识因素

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