儿茶的性状特征有
A.方块状或不规则块状
B.表面平滑而稍具光泽
C.质硬,易碎
D.气微香,味淡
E.断面平坦
参考答案:A,B,C
Mike is ______ grade student ______ wants to be a professional basketball player. [ ]
A. a ten; who
B. the tenth; that
C. the tenth; which
D. a tenth; who
我国耕地资源十分短缺,随着人口的不断增加,人地矛盾越来越尖锐。因此,我们要转变观念,向海洋要耕地、向湖泊要耕地、向高山要耕地,开展围海造田、围湖造田、开山造田运动。( )