200号溶剂汽油是烃类化合物的混合物，由于其中芳烃含量不同，它表现的（）力也不同。
参考答案：溶解
After the patients went into the office,＿＿working.
A．only a doctor did they see
B．only a doctor saw they
C．only a doctor they saw
D．only a doctor had they seen
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