药材没药粉末的乙醚提取物遇硝酸显()
A.粉红色
B.褐紫色
C.红棕色
D.黑褐色
E.污绿色
参考答案:B
I would appreciate _________ if you could come to my birthday party.
A.you
B.that
C.this
D.it