下列溶剂中能与水分层的极性最大的有机溶剂是
A．乙醚B．乙醇C．乙酸乙酯D．正丁醇E．丙酮
参考答案：D
解析： 常见溶剂的极性和亲水性。
The style of Western art has changed many times ______ Chinese art has changed less often.
A．while
B．before
C．since
D．however
参考磁平
