当需要调查的问题不十分明确时,为确定调查课题及调查重点而进行的调查称为()A.探测性

题型:单项选择题

问题:

当需要调查的问题不十分明确时,为确定调查课题及调查重点而进行的调查称为()

A.探测性调查

B.描述性调查

C.因果关系调查

D.预测性调查

考点:中级铁路运输中级铁路运输题库
题型:单项选择题

小儿使用放射性药物的原则不包括()。

A.儿童可根据需要首先考虑选择放射性核素显像方法

B.小儿所用放射性活度较成人少

C.可根据年龄组粗略算用药量

D.可根据体重算用药量

E.1~3岁用药量为成人的30%~50%

题型:单项选择题

慢性化脓性中耳炎的治疗原则是()。

A.消除病因

B.控制感染

C.清除病灶,通畅引流

D.恢复听功能

E.以上均正确

题型:单项选择题

1950年6月,中共七届三中全会确定的中心任务是()

A.迅速消灭国民党残余势力

B.完成新解放区土地改革

C.统一全国财政经济工作

D.争取国家财政经济状况的基本好转

题型:单项选择题

A volcanic eruption in Iceland has sent ash across northern Europe. Airlines have stopped or changed the flights across the Atlantic Ocean, leaving hundreds of passengers stuck in airports.
Grimsvotn is one of the largest active volcanoes in Europe. What makes Grimsvotn different is that it lies under a huge glacier(冰川) of ice up to 12 meters thick. The hot volcano heats up the ice above it, which then forms a layer(M) of water between the glacier and the volcano. This layer of water puts pressure on the volcano ,keeping it stable. As the water flows out from under the glacier, the pressure Rifts. The lava(岩浆) from the volcano then comes up to the surface. This is exactly what has happened today.
Now, airlines have to make changes to their flights so as not to fly through the clouds of volcanic ash. According to KLM, one of Europe’s biggest airlines, airplanes cannot go under the cloud or over it. Going through the cloud can result in ash getting stuck in the airplane’s engines, causing damage to the plane.
The eruption has also caused problems for animals in Iceland. The volcano left ash and sharp, glass-like rocks all over the countryside. Farmers are keeping their animals inside to stop them from eating ash-covered grass or the sharp objects.

Which of the following is the result of the volcanic eruption

A.People stop traveling in Europe.

B.Airlines suffer from the loss of planes.

C.It becomes dangerous for animals to eat outside.

D.Farmers have lost many of their animals.

题型:单项选择题

慢性再生障碍性贫血的骨髓增生程度可为( )

A.增生极度活跃

B.增生明显活跃

C.增生活跃

D.增生减低

更多题库