吴莱萸粉末中可见
A．石细胞
B．纤维
C．非腺毛
D．油管碎片
E．草酸钙簇晶
参考答案：A,C,E
正数a，b，c满足a+b+c=1，求证：(1-a)(1-b)(1-c)≥8abc。
Look at the picture. The painter, I think, is the most ______ artist in the country.
A．creative
B．powerful
C．effective
D．responsible
