在大型建设工程项目中，信息的交流问题导致工程变更和工程实施的错误约占工程总成本的(

一新生儿，胎龄36周，生后3小时出现呼吸困难，青紫，伴呼气性呻吟、吸气性三凹征，呈进行性加重，双肺听诊呼吸音减低，诊断最大可能是（）

A.羊水吸入性肺炎

B.胎粪吸入性肺炎

C.新生儿肺透明膜病

D.产后感染性肺炎

E.新生儿败血症

We have done a survey recently to find whom students will turn to 1.______

when they in trouble .The following are the results .     2.______

Most of students will go to their friends ,because  3.______

they are almost the same age and are able to  4.______

understand each other easy .Some students will tell  5.______

their parents or teachers about their troubles for the reason that they all 6.____

have too much experience that they can be trusted   7.___

by their kids and students. Only a few students    8______

prefer to solving the problemsall by themselves .They hate to talk with others  9______

and can’t get on well with others .As a result ,they have more friends . 10._____

甲、乙两颗人造卫星绕地球作圆周运动，半径之比为R₁:R₂=1:4，则它们的运动周期之比和运动速率之比分别为

A．T₁:T₂=8:1，v₁:v₂=2:1

B．T₁:T₂=1:8，v₁:v₂=1:2

C．T₁:T₂=1:8，v₁:v₂=2:1

D．T₁:T₂=8:1，v₁:v₂=1:2

钢筋依含碳量的大小，可分为低碳钢、中碳钢和高碳钢，其中高碳钢的含碳量为（）

A.0.20%

B.0.25%

C.0.26%～0.60%

D.＞0.6%

有关CT图像伪影的概念，正确的论述是

A．图像中不正常的解剖影像

B．被检体以外物质影像的显示

C．被检体内不存在的假像

D．图像中密度过高或过低的影像

E．影片中图像的变形