听力原文: Every family has its own problems. Here is what one family decided to do about its problems.
A newspaper recently printed an article about a family in the state of Wisconsin. The family's name is Brown. The interesting thing about the family is that it has its own constitution. Young Tim Brown suggested writing one. He is one of six children. The oldest one is 22 years old, and the youngest is seven.
Tim decided that a constitution was needed. Although the members of the family loved each other, they often disagreed. They did not agree about doing the jobs that needed to be done. Which child should wash the dishes? Which one should clean the house? Who should cut the grass and set the table? The answers to these questions were written down. All the children in the family signed the constitution, which named Tim's father and mother as "Presidents for Life".
There is a law about the time when the children in the family must go to bed. According to the constitution, everyone under 14 must go to bed before 10 p.m. As it happens, Tim is 14 years old.
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A.They often fight with each other.
B.There are too many children in the family.
C.Tim hated to do housework.
D.They often have disagreement about important family matters.
第1题
关于射频线圈的叙述,错误的是
A.射频线圈的形状都是马鞍形
B.表面线圈用于接收信号
C.相控阵线圈具有较好的信噪比
D.发射线圈用于射频激发
E.发射线圈和接收线圈不能同时工作
第2题
在表面线圈的应用中,下述内容最贴切的是()
A.大范围线圈,大区域检测,具有高信噪比
B.大范围线圈,帏区域检测,具有高信噪 比
C.帏范围线圈,帏区域检测,具有高信噪比
D.大范围线圈,大区域检 .,具有高信噪 比
E.帏范围线圈,帏区域检测,具有低信噪比
第3题
以下有关混凝土结构的特点叙述错误的是()。
A.强度较高
B.可模性好
C.自重小
D.施工复杂
第4题
有关旋转阳极的叙述,错误的是
A.有效焦点面积小
B.结构复杂造价较高
C.曝光时间短
D.功率大
E.适于连续功率使用
第5题
有关旋转阳极的叙述,错误的是
A.有效焦点面积小
B.结构复杂造价较高
C.曝光时间短
D.功率大
E.适于连续功率使用
第7题
下列有关前列腺MRI扫描技术的叙述,错误的是()
A.扫描时尽量选用小线圈以提高信噪比
B.T2WI需要加脂肪抑制技术
C.增强时,要加脂肪抑制技术
D.扫描时需要使用呼吸门控
E.疑有出血时,T1WI就加脂肪抑制
第8题
表面线圈的主要作用()
A.扩大了成像容积
B.提高图像信噪比
C.缩短成像时间
D.增加空间分辨率
E.增加对比度
第9题
在表面线圈的应用中,下列描述最贴切的是
A、大范围线圈,大区域检测,具有高信噪比
B、大范围线圈,小区域检测,具有高信噪比
C、小范围线圈,小区域检测,具有高信噪比
D、小范围线圈,大区域检测,具有高信噪比
E、小范围线圈,小区域检测,具有低信噪比
第10题
A.线圈分为体线圈、头线圈及各种表面线圈
B. 体线圈信噪比最低
C. 表面线圈信噪比最低
D. 成像组织与线圈之间的距离越近信号强度越高
E. 检查时选择合适的表面线圈
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