问题 问答题 简答题

试述常用的五种细胞化学染色名称及其主要的应用价值。

答案

参考答案:

①POX染色,主要用于急性淋巴细胞白血病与急性非淋巴细胞白血病的鉴别,前者多呈阴性或者阳性率小于3%,后者多呈阳性反应。

②PAS染色,又称过碘酸-雪夫反应,是了解淋巴系和红细胞系病理改变的指标。

③NAS-DCE染色,阳性反应常出现在粒细胞系,是确定急性白血病中存在粒细胞白血病细胞的依据。

④NAS-DAE染色和NaF抑制试验,阳性程度在单核细胞系较高,能被NaF抑制,临床上用来确定单核细胞白血病。

⑤NAP染色,阳性反应出现在成熟的中性粒细胞,其阳性程度及其以此为基础计算的NAP积分是用来判断感染和中毒反应的存在、了解中性粒细胞成熟度、区别类白血病反应与慢性粒细胞白血病的重要指标。

阅读理解

Let’s go camping

What do we do when we go camping? First, we work out a plan. We take food, clothing, a knife, and things for cooking and eating. We take things to keep us away from insects(虫子) and the sun.

Then we put everything into the car and we drive to the woods(树林、林地). We look for a place for campers(露营者) and we look for a good place for our tent(帐篷). The place should have a lot of moving air. This will keep some insects away. High land with water on both sides of it is good. Then we put up our tent. We put everything into the tent, and we are ready for fun. We can swim in the lake, walk in the woods, climb a mountain, row a boat, or go fishing.

In the evening we come back to the tent, we build a big fire because it can keep the insects away. We sit around the fire and talk. We may tell interesting stories or we may sing songs.

At night we lie down on the grass. We can look up at the stars. It is a busy day, so we try to go to sleep early.

Everything is dark. Everything is quiet. We hope we won’t hear music from the radio in the next tent. We hope it won’t rain.

小题1:Before going camping we should first         .

A.draw up a plan

B.take some food

C.take things to keep us warm

D.take something for cooking and eating小题2:We go to camp         .

A.by bus

B.by car

C.by bike

D.on foot小题3:Campers can take part in _______ activities.

A.one or two

B.only a few

C.many

D.two or three小题4:In the evening we build a fire because         .

A.it is cold at night

B.it can keep us warm

C.it can keep the insects away

D.it is dark and quiet小题5:The campers like to _______ at night.

A.hear music from the radio

B.go to sleep early

C.have rain

D.be busy

单项选择题 A1型题