省级植物检疫机构的主要职责：拟订本省的《（）》、《补充的植物检疫对象及应施检疫的植物、植物产品名单》和具他植物检疫规章制度。
参考答案：植物检疫实施办法
两组呈正态分布的数值变量资料，但均数相差悬殊，若比较离散趋势，最好选用的指标为（）。
A.全距
B.四分位数间距
C.方差
D.标准差
E.变异系数
I music since I was a little girl. However, I never dreamed of working of working with an American student to make music before I took part in a cross- cultural learning project.
A．loved; had
B．have loved; have
C．have loved; had
D．love; have
