问题
单项选择题
中国药典中色谱分析两个色谱峰的分离度的计算公式是（）
A.A
B.B
C.C
D.D
E.E
答案
参考答案：D
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中国药典中色谱分析两个色谱峰的分离度的计算公式是（）
A.A
B.B
C.C
D.D
E.E
参考答案：D
请根据句意从方框中选择合适的词, 并用其适当形式填空，使句子通顺。
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| 1. People often admire _____________ and want to do things like them. 2. —Who taught your brother drawing？ —Nobody. He taught ____________. 3. We must understand the _____________ of learning a foreign language. 4. Nick stayed _____________ after the car accident. 5. “You shouldn’t be so careless,” Mrs Smith said _____________ to her son. |