---_____?---I’ve got a headache.
A. What’s the wrong with you
B. What’s trouble
C. What you’ve got
D. What’s the matter with you
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---_____---It’s very hot.
A. What bad weather!
B. It’s a fine day, isn’t it?
C. Do you like the day?
D. How is the weather in Changsha?
---Are you confident about the final exam, Jim?---_____. I’ve got everything ready!
A. Sure, I am
B. Yes, I do
C. Of course not
D. I am afraid not
---Hi! I’m Judy. Are you new here?---_____
A. No, I don’t.
B. Yes, I do.
C. I’m from Changsha.
D. Yes, I am.
HPLC系统性试验是指用规定的对照品对色谱系统进行试验和调整,应符合规定。 系统性试验通常包括
A. 理论塔板数
B. 分离度
C. 重复性
D. 拖尾因子T 在0.95-1.05
E. 准确度
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