用气相色谱分析混合物时,各组分的保留时间差异取决于
A.各组分在两相间的分配系数
B.柱效
C.检测器的灵敏度
D.记录仪走纸速度
E.柱前压
参考答案:A
根据答句写出对应的问句。
1. ____________________________________________?
I eat dinner at 7: 00 in the evening.
2. ____________________________________________?
My favourite season is spring.
3. ____________________________________________?
I can make a snowman in winter.
4. ____________________________________________?
My birthday is in March.
5. ____________________________________________?
I often visit my grandma on the weekend.
首先明确区分癫狂与瘸证不同的医家是
A.张仲景
B.张景岳
C.王肯堂
D.李用粹
E.李中梓