洗脱或展开溶剂为中性的情况下，一般不适合于生物碱分离的吸附剂有( )
A．碱性氧化铝B．中性氧化铝C．ODSD．碱性硅胶E．酸性硅胶
参考答案：E
—Why not buy the beautiful necklace since you like it so much?
—I would but I _____ have enough money. [ ]
A. didn't
B. shouldn't
C. don't
D. hadn't
孟轲的特殊经济思想是（）。
A、财政观
B、价格观
C、社会分工论
D、恒产论
