血凝抑制试验中,移液器的正确使用是关键,下列关于移液器的使用错误的是

答案查看网，轻松搜题/搜资源

【单选题】【消耗次数：1】

① 吸液和吹液都应推到第二档

② 移液器吸头均不应该接触V孔中液体

③ 取不同液体时一定要换吸头

参考答案：

复制

纠错

相关题目

【判断题】未装吸头的移液器一定不能吸取任何液体。

① 正确

② 错误

查看完整题目与答案

【判断题】带有残余液体吸头的移液器不可以平放。

① 正确

② 错误

查看完整题目与答案

【单选题】吸液时，移液器与桌面的角度为：

① 倾斜

② 垂直

查看完整题目与答案

【多选题】关于移液器使用，下列说法正确的是：

① 用完后调至最大量程

② 用完调至最小量程

③ 用完挂在专用支架或试验台金属杆上

④ 用完平置于试验台

查看完整题目与答案

【多选题】下列有关移液管的使用错误的是()。

① 一般不必吹出残留液

② 用蒸馏水淋洗后即可移液

③ 用后洗净，加热烘干后即可再用

④ 移液管只能粗略地量取一定量液体体积

查看完整题目与答案

【单选题】一般情况，在果冻液中结力液占全部液体浓度的( )时，才能使液体基本凝固。

① 2%

② 3%

③ 5%

④ 7%

查看完整题目与答案

【单选题】在血凝抑制试验中,试验成立的条件是

① 无血清样品孔完全凝集，无红细胞沉积点

② 空白孔红细胞沉积并呈泪滴状流下

③ 无血清样品孔完全凝集，无红细胞沉积点，空白孔红细胞沉积并呈泪滴状流下

④ 时间到即可读数

查看完整题目与答案

【单选题】悬液型液体制剂中甘油属于（）。

① 止痛剂

② 润湿剂

③ 助悬剂

④ 抑菌剂

⑤ 絮凝剂

查看完整题目与答案

【单选题】反向吸液的方法是

① 二档吸，一档吹

② 一档吸，二档吹

③ 一档吸，一档吹

④ 二档吸，二档吹

查看完整题目与答案

【单选题】重度烧伤后补液，晶、胶液体的比例正确的是

① 一般为1：2

② 一般为1：1.5

③ 一般为2：0.5

④ 一般为1：l

⑤ 广泛深度烧伤为0.5：1

查看完整题目与答案

随机题目

【单选题】 Television is a remarkable_________ !

① discussion

② suggestion

③ invention

④ declaration

查看完整题目与答案

【单选题】 You can buy things_________ special low prices when department stores have sales.

① at

② in

③ on

④ for

查看完整题目与答案

【单选题】阅读理解：阅读下列短文，回答文后问题，选择最佳答案Trees mainly serve man in three important ways: They provide him with wood and other products; they provide him shade; and they help to prevent droughts and floods.Unfortunately, in many parts of the world, man has not realized that the third of these services is the most important．In his eagerness to make money from trees, he has cut them down in large numbers, only to find that without them he has lost the best friends he had. And besides, he is usually too careless to plant and look after new trees. So the forests slowly disappear.This does not only mean that man will have fewer trees. The results are even more serious: for where there are trees, their roots break up soil allowing the rain to sink in and also bind(固定) the soil, thus preventing it from being washed away easily；but where there are no trees, the rain falls on hard ground and flows away, causing floods and carrying away the rich top-soil. When the top-soil is gone, nothing remains but worthless desert.Two thousand years ago，a rich and powerful country cut down its trees to build warships, with which to gain itself an empire．It set up the empire, but, without its trees, its soil became poor and grew weak. When the empire fell to pieces, the home country found itself faced by floods and starvation(饥荒)．2. In many places forests slowly disappear because __________.

① A. many trees have been cut down by man

② B. new trees are not well looked after

③ C. man has not paid enough attention to planting trees

④ D. all the above

查看完整题目与答案

【单选题】 _________ people have a photographic memory.

① No

② None

③ Some

④ All

查看完整题目与答案

【单选题】 Rowland Hill was the first to_________ a proposal to use stamps.

① put forward

② put up

③ put away

④ put on

查看完整题目与答案

【单选题】 Why has jogging become so popular? Because jogging is a very_________ exercise.

① boring

② disturbing

③ frustrating

④ interesting

查看完整题目与答案

【单选题】 Your long-term memory_________ everythingthat you remember.

① concludes

② conveys

③ closes

④ contains

查看完整题目与答案

【多选题】垄断竞争厂商的需求曲线包括（）

① 主观需求曲线

② 客观需求曲线

③ 弯折的需求曲线

④ 线性需求曲线

查看完整题目与答案

【多选题】在长期中，下列成本中哪些是存在的（）

① 总成本

② 平均成本

③ 机会成本

④ 不变成本

查看完整题目与答案

【多选题】以下是垄断竞争行业的特征（）

① 有进入限制

② 企业以利润最大化为目标

③ 企业面临着向右下方倾斜的需求曲线

④ 企业生产有差别的产品

查看完整题目与答案