下列用于减少CT影像运动伪影的方法,错误的是() A.检查前训练患者呼吸 B.减少或

题型:单项选择题 A1/A2型题

问题:

下列用于减少CT影像运动伪影的方法,错误的是()

A.检查前训练患者呼吸

B.减少或不做吞咽动作

C.儿科患者服用镇静剂

D.提高扫描速度

E.降低X线扫描剂量

考点:放射科基础知识CT成像基础CT成像基础题库
题型:单项选择题 A1/A2型题

Can plants eat people? Probably not, but there are many plants that eat meat. Some of them are big. And they can eat small animals. One famous meat-eating plant is the Venus flytrap(捕蝇草).

The Venus flytrap is a very strange plant. It grows in dry parts of the United States. Its leaves are like the pages of a book. They can open and close very quickly. Inside the leaves, there are three small hairs. If a fly touches one of the hairs, the leaf closes quickly. The fly cannot get out. In about half an hour, the leaf presses the fly until it is dead. Then, the plant covers the fly. Slowly, the plant eats the fly.

Why do plants do it? Most plants get what they need from the sun, the air, and the ground. In some places, the ground is very poor. It doesn't have all these important things, especially nitrogen(氮). Animal meat has a lot of nitrogen, so some plants eat meat to get what they need. Let's hope that some of the bigger plants don't get the same idea!

小题1:The Venus flytrap is a kind of _________.   

A.plant

B.animal

C.food

D.meat小题2:The underlined word "presses" probably means _________ in Chinese.

A.挤压

B.关上

C.打开

D.松开小题3:Why do some plants eat animal meat?

A.Because plants are dangerous to animals.

B.Because animals are dangerous to plants.

C.Because plants want to get what they need from animal meat.

D.Because plants want to protect themselves against animals.

题型:单项选择题 A1/A2型题

小虎同学在计算a+2cos60°时,因为粗心把“+”看成“﹣”,结果得2006,那么计算a+2cos60 °的正确结果应为(    )。

题型:单项选择题 A1/A2型题

选煤厂各环节设备处理能力的不均衡系数的选取,应符合下列()的规定。

A.在配(原)煤仓后,在额定小时能力的基础上,煤流系统取1.5

B.在配(原)煤仓后,在额定小时能力的基础上,矸石系统取1.5

C.在配(原)煤仓后,在额定小时能力的基础上,煤泥水系统系统取1.15

D.在配(原)煤仓后,在额定小时能力的基础上,重介悬浮液系统取1.25

题型:单项选择题 A1/A2型题

泉州春节备节,节前要完成()。

A、祭神

B、扫尘、拆洗

C、烧天金

D、祭祖

题型:单项选择题 A1/A2型题

下列硫黄成型工艺中,单机生产能力最大的是()工艺。

A、转鼓结片

B、空冷造粒

C、带式结片

D、带式造粒

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