醌类衍生物发生Feigl反应生成的化合物颜色为（）
A.紫色
B.橙色
C.蓝色
D.红色
E.橙黄色
参考答案：A
—I called you yesterday, _____ nobody answered it. Where _____ you?
—Our family went to Hangzhou. [ ]
A. and; are
B. but; were
C. so; were
D. but; did
镜像阶段
