问题 单项选择题

以下有关细菌内毒素检查法的论述中,正确的是()

A.2000年版《中国药典》才将该方法录入

B.细菌内毒素检查用水系内毒素含量小于0.015EU/ml(用于凝胶法)或0.005EU/ml(用于光度测定法)且对内毒素试验无干扰作用的灭菌注射用水。

C.试验用的器皿等需经120℃干烤1小时

D.新购入的鲎试剂已标明灵敏度的,可不经复核,直接应用;测试样品结果判断是将试管从恒温器中轻轻取出,缓缓转动90°以判断结果

E.测得鲎试剂灵敏度(λC.在0.5~2.0λ时,不可以λ为该批鲎试剂的灵敏度

答案

参考答案:B

解析:1995年版《中国药典》已将该方法正式录入。细菌内毒素检查用水依据《中国药典》(2010版)二部附录“细菌内毒素检查法”项下:细菌:内毒素检查用水系指内毒素含量小于0.015EU7/ml(用于凝胶法)或0.005EU/ml(用于光度测定法)且对内毒素试验无干扰作用的灭菌注射用水。试验所用器皿,需经处理,除去可能存在的外源性内毒素,常用的方法是250℃干烤30分钟以上,也可用其他适宜的方法,并应确证不干扰细菌内毒素检查。每批新的鲎试剂在用于试验前都要进符灵敏度的复核。结果判断是:将试管从恒温器中轻轻取出,缓缓倒转180℃以判断结果。按规定方法测得的灵敏度值λc在0.5~2.0λ(包括0.5λ和2.0λ)时,方可用于细菌内毒素检查,并以λ为该批鲎试剂的灵敏度。

阅读理解

阅读理解。

     The Dragon Boat festival is known as dragon-boat racing(龙舟赛).Dragon-boat racing is the most popular

activity during the festival,especially(尤其)in South China.A dragon boat looks like a dragon,and is painted in

red,white,yellow or black.Usually, a dragon boat is 20 to 40 metres long,and needs 20 people to row.Boatmen

row the boat in cadence (节奏) with the drumbeats(鼓点) ,as the captain  (船长)  in the front of the boat waves a

small flag to help coordinate(使动作协调)the rowing.

     Dragon-boat  racing   is   quite a spectacle (奇  观).Now   it becomes  a  popular activity  in  South  China.

International(国际的)dragon-boat racing is held in Guangzhou and Hong Kong every year.

1.The Dragon Boat festival is on       . 

A.1st day of January            

B.15th day of January

C.5th day of April              

D.5th day of May

2.What is the most popular activity during the Dragon Boat Festival?     

A.Dragon-Boat racing          

B.trick or treat

C.Pumpkin lantern            

D.Eat rice dumplings

3.A Dragon boat is       to       metres long and needs        people to row.     

A.20;30;20    

B.20;40;20    

C.10;40;20      

D.2;40;10

4.If you want to watch international dragon-boat racing, you can go         .

A.Guangxi and Guangzhou        

B.Guangzhou and Fujian

C.Guangzhou and Hong Kong      

D.Hong Kong and Guan.

5.This passage is about      

A.the dragon Boat Festival    

B.Dragon-boat racing

C.how to row the boat        

D.South China

单项选择题