防除大豆杂草可选用阿特拉津胶悬剂。
参考答案:错
_____ worries the doctor most was _______ they could find the cause of the disease.
A.What; how
B.That; that
C.What; what
D.How; what
斜轴圆锥投影中的经纬线表现为()。
A.曲线
B.同心圆弧
C.同心圆
D.直线