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多项选择题
用于药物含量测定方法的效能指标有
A.定量限
B.精密度
C.准确度
D.选择性
E.线性范围
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相关考题
单项选择题
So, you love the Internet. It's a great place to find information or go shopping. It's fun, but do you spend a lot of time online? Experts say 6%0 of Internet users are Internet addicts (上瘾的人)-they are always online. “Internet addicts are often young people,” says one expert, “and they usually have problems with family, friends, work, and school”.
Go through the following check list. If you answer yes to all these questions, maybe you are Internet addict.
1. Do you spend a lot of time on the Internet? 口Yes口No
2. Do you think or talk about the Internet all the time? 口Yes口No
3. Are all your friends" Internet friends"? 口Yes口No
4. Is the Internet your only hobby? 口Yes口No
5. Do you ever miss appointments(约会) because you are online? 口Yes口No
So, what do you do if you think you are an addict? Go to an advice service. Where is it? On the Internet, of course!
13. According to one expert, Internet addicts are often young people who usually_____.
A、enjoy a lot of hobbies
B、suffer from poor health
C、have problems with life and work
D、take thorough medical examinations
多项选择题
定额的编制原则是
A、强制性
B、控制量
C、量价分离
D、技普分开
单项选择题
根据分散系统的不同,气雾剂可以分为溶液型、乳剂型和混悬型三种,其中属于三相气雾剂的是
A 溶液型
B 溶液型和乳剂型
C 乳剂型和混悬型
D 溶液型和混悬型
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