在造影期间进行两次曝光,一次是在对比剂到达兴趣区之前,一次是在对比剂到达兴趣区并出现

题型:单项选择题 A1/A2型题

问题:

在造影期间进行两次曝光,一次是在对比剂到达兴趣区之前,一次是在对比剂到达兴趣区并出现最大浓度时。如果病人在曝光过程中保持体位不移动,则两图像之间的唯一差别是含有对比剂的血管,它们两者的差值信号就是DSA的信号。随着血管内碘浓度(PI)与血管直径(d)乘积的增加,DSA差值信号也增加。故DSA的信号由对比剂的投射浓度(PI)和血管直径(d)所决定。在DSA检查过程中,患者本身自主和不自主的移动、心脏搏动、吞咽、呼吸或胃肠蠕动等,可形成运动性伪影。

关于DSA的成像原理叙述错误的是()

A.没有注入对比剂的数字图像矩阵存于存储器1内作为mask像

B.DSA是建立在图像相减的基础上的

C.减影结果反映对比剂的作用

D.生理运动伪影可以完全消除

E.可能同时减去骨骼和软组织影

考点:放射医学技师放射技师专业实践能力放射医学技师专业实践能力考前冲刺三
题型:单项选择题 A1/A2型题

综合阅读。

       Is there a chocolate-powered racing car in the world? Hey! You have read too (A)______ children's books!

But wait! Now, there is really such a racing car in the world. A team from a British university made it. 

      The chocolate-powered racing car's engine (发动机) uses waste from chocolate factories or vegetable oil

as fuel (燃料). Its body (B) 土豆制成, its steering wheel is made from carrots, its seat is made of soybeans,

(C)_______ its brake pads (刹车片) are made from nuts! Well, can this car run very fast? (D) Certainly! It can

go from zero to 60 miles per hour in 2.5 seconds, and go as fast as 135 miles per hour. When the racing car is

running, it cleans itself and lets out oxygen. 

      "It took us more than nine months to (E) complete the racing car," said a team member. "The car is really

green. You can find many of the car's parts at a farmer's market or even in a litter bin because most of the

materials (材料) are waste in most people's eyes. It's fun."

       However, (F) this eco-friendly (环保的) car cannot be driven in the official (正式的) race because of the

engine's unusual flue.

1.在文中(A)和(C)的空白处分别填入适当的词 _______  _______

2.将文中划线部分(B)译成英语:_______

3.写出文中划线部分(D)和(E)的同义词语或近义词语:_______  _______

4.将文中划线部分(F)改写为:the engine's unusual flue makes it _______ to _______ this eco-friendly car in

     the official race

5.从文中找出能说明本文中心大意的短语:_______

题型:单项选择题 A1/A2型题

A工作有两项紧后工作B、C,已知B工作的ES=10d,LS=18d,C工作的EF=12d,LF=16d,且A工作的FF=2d。则A工作的TF为( )d。

A.10

B.8

C.6

D.4

题型:单项选择题 A1/A2型题

下列关于内部控制测试的说法中,正确的有()。

A、监盘是内部控制测试的常用方法之一

B、通过内部控制测试以评价内部控制的可信赖程度

C、内部控制测试在审计实施阶段进行

D、内部控制测试在实质性审查之后进行

E、任何审计项目都要进行内部控制测试

题型:单项选择题 A1/A2型题

某项目拟完工程计划投资为50万元,已完工程实际投资为65万元,已完了程计划投资60万元,则进度偏差为( )万元。

A.15

B.5

C.-5

D.-10

题型:单项选择题 A1/A2型题

目前,中央银行采用的货币政策工具不包括( )。

A.公开市场业务
B.税收管制
C.贴现率政策
D.准备率

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