问题
单项选择题
管道式分析仪中空气分段系统是指在吸入管道的每一个标本、试剂以及混合后的反应液之间，隔开的物质是（）
A.空气
B.试剂空白
C.缓冲液
D.蒸馏水
E.氮气
答案
参考答案：A
解析：空气分段系统是指在吸入管道的每一个标本、试剂以及混合后的反应液之间，均有一小段空气间隔开。
搜题请搜索小程序“爱下问搜题”
管道式分析仪中空气分段系统是指在吸入管道的每一个标本、试剂以及混合后的反应液之间，隔开的物质是（）
A.空气
B.试剂空白
C.缓冲液
D.蒸馏水
E.氮气
参考答案：A
解析：空气分段系统是指在吸入管道的每一个标本、试剂以及混合后的反应液之间，均有一小段空气间隔开。
| Cloze test. 完形填空。 |
| Hello, my name is Lily. I 1 in China. I 2 Chinese. And I can 3 English, too. Here is a map for you. This is a map 4 China-our country. Look at this city. It's Beijing. It's the capital city 5 China. There 6 a lot of famous scenic spots and places of historical interest (有许多名胜古迹). Do you know the 7 Museum and 8 Square? They are great. We have the biggest (最大的) square in the 9 . If you want to know more (更多的) about China, you can write an 10 to me. |
| ( ) 1. A. live ( ) 2. A. talk ( ) 3. A. speak ( ) 4. A. in ( ) 5. A. in ( ) 6. A. am ( ) 7. A. Palace ( ) 8. A. Tian'anmen ( ) 9. A. city ( ) 10. A. letter | B. lives B. speak B. talk B. of B. to B. is B. Place B. tiananmen B. world B. e-mail | C. living C. say C. say C. to C. of C. are C. place C. tianmen C. earth (地球) C. mail |